Dont play shitty games whose devs(or rather the companys behind) purposefully fuck up to not let it run on Linux

I don't. Most games I play are single player indie titles that run perfectly fine on the steam deck. I'm merely pointing out that people also like to play multiplayer games, and particularly in the competitive games, anti cheat software is often used to thwart cheaters and unfortunately that anti cheat software is often incompatible with linux/proton, either by lack of consideration or on purpose.

you should be mad at them not searching for the fault at valve or Linux.

At no point did I blame valve or linux for these issues, feel free to point out where I did that. I was clearly blaming the game developers that implement such "features" to the detriment of linux users.

All I was saying that your "solution" to "just install linux" is, unfortunately, not something that universally works for everyone.