For me it would be that lifting can take time. It's okay to start with light weights and it's okay that getting bigger will take more than three months. Sure, pushing yourself is good to make progress, but everyone has their limits.
Also, lifting can be for more than just getting bigger. In the beginning I was hyper focussed on getting more muscular and it led to me taking awful homemade protein/caloric shakes which cannot be healthy long term. It took me pretty long to understand that this way of training was not what I wanted. Luckily I now know that I want to focus on strength and stamina and that size comes second.
How about you?
From what I've been told that method will at best work out the wrong muscles, and at worst cause serious injuries like hip damage or blowing out your knee. Like you can go lower than 90 degrees, but going too low will cause issues. Same with the feet angle/width thing, sure you can get away with it for awhile, but over time you can cause strain and damage. Maybe I'm wrong though, maybe I really have just been talking to the wrong people. There's a wide range of opinions on this stuff, so the best you can do is talk to a wide variety of people and try to come up with a consensus the best you can.