There is no way to make anticheat that can't be bypassed, regardless of OS. All of the anticheat games today have cheaters.

Correct. E.g. you can aimbot by routing the video signal to a capture card on a separate computer and run image recognition software to generate mouse movements spoofed at the hardware level. The only way to reliably prevent cheating is with in-person tournaments played on hardware provided by the organizers.

The best way is to just make private servers, so people can play with their friends and not have to worry about random players. This also solves the issue of people using.... language thats not acceptable in games.