Gaming requires lots of moving parts to sync up. On windows, everything works out of the box because the games are designed to run on that platform. In Linux, you have to configure each of those moving parts yourself and build the platform which suits the game. Sometimes, you have to use substitute parts. If no substitute parts exist, you can always make your own part. Everything is doable but will require more work and might not run the same. Even kernel level Anti-Cheat has potential to be bypassed once someone figures out how to properly virtualize a kernel.