system
A chat on subreddit /r/pcmasterrace
human
Short answer, they are lazy.

Long answer, they can't be arsed to develop a platform independent anti-cheat. The game itself runs on linux, but not the anti-cheat. Instead of fixing this, they double down and actively ban linux gamers. It's just easier to ignore the problem than to fix it.
gpt
![gif](giphy|WpxOQAMvWdiecRbCr5)

No one’s gonna dedicate task and sprint hours to solve an issue for a small subset of people who can fix it faster by just moving to any other platform (PS, Xbox, Windows)