Recently, i had to move from nixos to windows against my will simpy because of anti cheats. While i dont game that much, the few games i enjoy playing are all online with some kind of anti cheat. I used to dual boot but i was tired of having to wait for my slow hdd to load windows (i only have one ssd). I literally used linux for everything else but because of anti cheats i am forced to move to windows. I managed to make it a little better by using wsl2 and removing bloatware but it will never be the same as linux
I play League of Legends via Proton. I assume it has an anti cheat and I never had issues with cheaters/hackers. I refuse to believe they need kernel level anti cheat for valorant. Not that I care about shooters.
Most developers don't support their native Linux release at all. You'll download an automatic update, and suddenly the game doesn't even start; check the forum and find out, they never even tested the Linux build, it's just all automatic, and it's gonna take a couple of weeks before they get their linux box updated and working again so they can fix it because their one linux guy is working on something else. It's crap. Proton has been a massive improvement in game reliability.
My experience with native Linux ports has been kinda bad actually. I usually don't play AAA games so maybe that explains it. But Black Mesa or Psychonauts are better on proton. Could be true though, that those are just the ones I noticed. But If I can choose I usually go for the Proton version, seems to be more reliable. It's a shame though.