Might be game dependent but nowadays games like withcher 3 run better on linux then windows for me.
Anti-cheat is admittedly a pain though. Chivalry 2 used to work and now no longer does.
Though those anti cheats tend to be very invasive so i prefer if everyone moved to a system thats is user personal security first so the market would align with that.
What games are they?
One of the reasons i am sticking with Arch is because steamdeck os is build on it, whats good enough to game for valve is good enough for me.
I have both Arch and my old windows install on separate m.2 ssds. By default i log into the arch one which uses the windows ssd as a game installation drive.
This way when i do have to use windows for some game modding or testing, i can easily access and sometimes run the games from there.
The public library.
I get that digital collections may be beyond the scope of this place but i have been archiving a lot of discs since i became aware of content disappearing.
Those first two are reported to work incredibly well using proton compatibility on steam. Proton is not the same as native support, which is why its not mentioned in any official game Information but it is native to steam. (Also works in heroic and litrus for gog/epic/other)
A platinum (community) rating is as high as it gets, may as well be native or better then on windows.
https://www.protondb.com/app/548430
https://www.protondb.com/app/899770
For TFT i found they use the same anti cheat as some other games. Used to work before, no longer does now but with dual boot all your current stuff is just a minute away (windows updates not included)