Valve really needs to push for Linux compatibility adoption for anti-cheat software.
Once Linux gets adopted by these companies, there's really no other feature Linux gaming can't one-up Windows gaming.
That is not easy. Linux is about having full control over our own hardware. Client-side anti-cheats are about preventing user of having full control of the system.
Especially the kernel-side anti cheats rely on kernel not being controlled by the user.
A few of them did. The problem is also implementation in the games.
In the past few months, I've been able to play more multiplayer games in Linux than before (notably Insurgency and Squad now work).
I tend to mostly play single player, but all in all, I don't even remember when I last booted my Windows partition. If it wasn't for a last glimmer of hope of reviving my Oculus CV1, I'd probably wipe it.