I think the most stringent types of Windows anti-cheat rely on remote attestation of the operating system. It's theoretically possible to design a Linux-based OS that supports such a capability, but the sort of people who choose Linux are unlikely to accept a third party having the final say over their computer.

I, for one am disappointed that anyone has accepted it. Once it's widespread, service providers can demand it, as we're seeing with mobile banking apps and game anticheat.

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.