Linux explicitely allows you to do things that makes cheating *really* easy.

There is also complete lack of secure boot and a way to validate that your kernel hasn't been compromised.

I mean seriously, making a cheat for a proton supported game that no anticheat has any hopes of detecting are in 100 lines of a kmod driver and 1 console command: insmod.

On windows you at least need to use scuffed tools like KDU to bypass signature verification requirements and every anticheat can detect you with a simple physical memory scan.