Another offender is Ubisoft, or more specifically the R6 Siege team. Battleye works perfectly fine on Linux - in fact, other Ubisoft teams have enabled Battleye-Linux support for their games (ex: For Honor) - but for whatever reason, the Siege team refuses to do so, even though it's one of the most upvoted issues on the bug tracker [1].
BattlEye is generally broken even on windows (though it happens that it is actually working as intended right now). Cheaters generally use windows, and switching to Linux will only be done when the windows anticheat is considerably harder to break, and with proton/wine, you even get to run the same version on both.
[1] https://r6fix.ubi.com/projects/RAINBOW6-SIEGE-LIVE/issues/LI...