I recently started playing a game that installed "anti-cheat" software that has done absolutely nothing to stop the amount of cheating in the game but it has made my Debian desktop unstable with random gnome and application crashes caused by their poor software. I never had crashes until that garbage got installed. It works exceptionally hard at preventing me from streaming my games I used to not have an issue with

kernel level invasive garbage would be beyond destructive and still not solve the problem

If it's on Linux then it wasn't kernel-level anti-cheat, and therefore mostly useless. It's not surprising that it did nothing to slow down cheating. Even KLAC can be circumvented. It increases friction and cost for cheaters but it doesn't solve the issue completely.

Ideally you would be free to not play KLAC games, and I would be free to play KLAC games. I just hope for the option one day, as I would very much like to make the move to Linux.