Back when I first used a computer we were told if it has ads and pop ups constantly then you have installed a virus. Try using a fresh install of windows....

Because windows is inconvenient for me.

Nothing works as I expect it, terminal takes ages to open, everything lags like shit, annoying popups everywhere, every setting is hidden behind ten thousand menus, subpar packaging system, explorer crashes every so often, PATH is hard to access and modify, takes a PHD to install a raw compiler without visual studio, you can forget about shortcut system cus even with autohotkey it's a pain.

(Talking about permissions) Why do I have to write names of users from the ground and then click button "check if it actually exists" in a fucking gui? Couldn't there be a drop down list?

If you ever want to modify the windows iso image or make an automated script without using online services you're just done mate. There's nifty surprises like special software which name I so conveniently forgot (God bless) that can open the file image contained inside the iso image, but if that inner image has wrong format you have to spend time converting it. Then you'll see some fucking insane shit in front of you, where you need to drag objects from a drop down list into different categories that have random ass names and not at all simple to understand even after reading official documentation. Oh you think that's all? You can drop same objects into different categories and they will do different shit. I took TWO WEEKS WORTH OF CLASSES to work with that software and I ALREADY DONT REMEMBER JACK.

Then there's utterly long startup times even on ssds, colemak dh mod basically doesn't exist... And that's all I could remember out the top of my head.

The only redeeming quality I'd say, is having a very simple setup for Japanese and Chinese IME. On arch KDE it took me awhile to set up fcitx with mozc the first time around.

Because it's a tool by one of the biggest, if not THE biggest, corporation ever made. It's nothing more than a way to lock-in users deeper in an ecosystem of extortion and learned helplessness.

Through Windows, computer users discover that they have a black box at work and then at home. It is NOT their computer. It is a computer that they are allowed to use a certain way. This then is extended in a myriad of ways, through other tools, e.g mobile phone, and services, e.g Office360, reinforcing that behavior. It becomes a second nature to the point that computer users dare not even imagine HOW they want to use a computer. Instead they buy whatever they are allowed to consume.

I do not care for Windows as an OS, I absolutely do HATE it though as a vehicle for cognitive enslavement. I do so keeping in mind the history of the company that made it. It is not a repeated random process, it's a strategy. This is what I find disgusting.

Warning, no technical stuff, only creed:

I don't hate Windows in and off itself. For me it represents my first contact with a computer and influences my choice of UI to this day.

I hate what it stands for, which for me is something I call "gated computing"; a restriction of access to computational power and abilities. It turns a machine with near limitless potential, like watching cat videos, sharing how to best build bridges or calculating the bygone cycles of the moon, to a machine that maliciously distracts people while giving a selected few the power of watching over them with ever changing objectives as to why they watch them.

Windows, like few others, eased people into thinking that that was the right way to use a computer all along.

That is why I hate it.

Proprietary software is a security risk, especially for US companies that can be legally served NSLs

I honest to god find Linux easier to use. Though it's maybe because the most used programs on my laptop are neovim, gcc and rust compiler and Firefox . And I shit you not, Microsoft purposefully slowed down the Firefox browser I installed from their store.

Plus I like using a tiling window manager when coding, now in Linux I have 500 options. On windows I get a middle finger and a dedicated nsa/fbi agent. Whats not to hate?

Aside from all the usual points that everyone else has already made: automation. Scripting stuff on Linux is relatively simple, trying to fuck about with powershell or work around a tool that's GUI-only is infuriating.

I don't hate Windows, I don't care about it. I don't use it.

I don't know if I "hate" Windows but more like "I'm done dealing it." I might come and use it time to time, but only when absolutely necessary, and the mental capacity to remove things I don't need and make sure its removed.

Please stay to the end because it's important, and it's going to be a horrible bait and switch but it's not INTENDED that way. I can't think of another way to present the difficult combination of interests that seem to be driving MS software lately.

I actually quite like Windows 11, and I love Edge when they're doing their core functions. Windows 11 is reasonably solid and useful for normal use. Edge is faster than Chrome and has the best vertical tabs implementation on the planet. Much of the baseline software that Microsoft is putting out has never been better, and is often really good at doing the basic things software should do. I really do feel like the genuine technology people in Microsoft are trying, and often succeeding, to make good technology products.

But... the bottom-feeder marketing drones and MBAs got their hands on them and started layering creepier and creepier nonsense over the top. Mandatory logins to glorified data collection engines. Monetization strategies masquerading as features. Overt advertisement. Heavy-handed promotion of Microsoft's own products. I finally stopped using Edge (on Linux!) when I discovered that just looking at the settings the wrong way would re-enable every intrusive setting imaginable and ditched Windows entirely when I saw the same things creeping into the OS (as well as a general disgust with privately-owned OSes in general). They are destroying trust.

In the great irony of my life, because normally work PC Windows installs have been hot garbage, I have Win11 on a work laptop and it's actually really great to use since all of the intrusive stuff is turned off by our security team. I would still prefer linux or macos (in that order), but as a "forced to use it" option, it's not bad at all. Go back and read that again: it's a pleasant and easy to use OS if all the intrusive marketing functionality is turned off because it presents a security hazard.

PS. Not sacrificing anything being predominantly linux-based and am in fact far, far more efficient on linux (and I am not a programmer or in any other technology role).

Great answers already, I'll not repeat them. One thing I want to mention though is the interoperability of the Linux applications. Things work together well. With Windows (up to 10 at least, I haven't used windows much in the last years) applications are mostly their own silo. In KDE it's quite fluent. E.g. gwenview, the image viewer offers to open an image in krita, gimp, etc. It also offers an option to add a folder to the "places" list in dolphin (the file manager). Dolphin lets you quickly (F4) open and close a terminal at the current folder within its window. Small things like these make the system feel coherent.

The other big thing for me is the plethora of great apps you have out of the box. And the ease to install new ones without worrying whether you are the product.

I think I need like 2 weeks to tell all the reasons I hate it.

I'm the kind of user that cares about function over form, so everything in Windows 11 just annoyed me. Mainly because it was just changes in design that required me to reorient and to learn to use again with no good reason.
I still use Windows at work just because our whole dev stack is on Windows. And every new design change just gets in my way. An OS should enable me do the things that I need and want, it should move out of my way. Sure I've added some hacks to restore the functionality I was used to. But the fact that I need to fight the OS to bring back context menus annoys me to no end.

Also, as a dev, I find many things easier done on Linux that Windows, mainly because it just has a better CLI support. It's not as bad now with Windows terminal, winget and other improvements (dotnet having a proper CLI interface), however I still mostly use git-bash for common stuff like searching the file system. Not to mention that for something like docker I basically just need WSL.

Because the only redeeming quality of Windows is the fact a lot of software works on Windows and only on Windows, which is also exactly the problem with Windows. It's great WINE can exist, but not all platforms support WINE, and as an OpenBSD user first and foremost it means I can't play many of my favorite games on my preferred platform.

Ultimately, Windows sucks and is a standard because our society puts corporate greed and thieves like Microsoft above superior projects; and even if Microsoft were firebombed off the planet tomorrow, they're just a symptom of the problem, and it's only be so long until another thief steps into Microsoft's position and ruins everything again.

Because every time I’m reminded the underlying OS exists it’s always something negative.

On windows: Forced restarts and updates that take over 5x as long as my Linux (or FreeBSD build), ui that constantly undoes what I customized, ads and preinstalled malware essentially like candy crush even on builds from Microsoft directly, worse performance with a much higher number of crashes under load on my current box, and no auto login/name any simple customization without screwing around with registry editor to name just the simple things. More advanced problems include no hypervisor built in to the home version, everything is pay to unlock features my Linux install does for free, no zfs software raid for storage safekeeping, most fixes when I do have errors involve googleing cryptic hex codes and being told to run fsck/chdsk as the only solution for often times hours of searching before finally finding the actual answer - not to mention most other fixes being to download a library/binary of the sketchiest sounding website ever that i can't verify isn't a virus.

On linux or even FreeBSD which took a bit to get installed to my liking i may have put work in up front but its like 3 hours at most of my time for 6+ years of stability and proper functioning to avoid all of the above plus no microsoft telemetry etc. I switched when i first tried Vista and even today every time i have to use Microsoft's horrific excuse for an OS it is heartburn inducing.