Outlook, Outlook Calendar, Teams, SharePoint... I'm honestly baffled by how bad they are. It's like it was made by aliens who only sort of understand what human beings want. And, of course, Microsoft is super selective about their product managers and pays them a ton of money--even though a golden retriever could have come up with a better UX. Literally all they had to do was fucking copy Google.
True for internet speed and web pages also. I don't really understand how it can take like 10 seconds on a 100 Mb/s connection for some text in a comments section to load, but I swear all the big websites are like that now.