Anti cheats basically don't work on Linux at all. One of the primary jobs of anti cheat software is to monitor the OS environment and detect people trying to inject code into the game process or read the game process's memory. On Windows kernel access is gate kept by Microsoft and restricts cheat software's options for how to read memory and inject code. The standard Win32 APIs are monitored and the cheats need exploitable kernel drivers to get in.
On Linux this can't work because a cheater can just build their own kernel with all the protections disabled or with intentional vulnerabilities. From what I've heard, statistics for games running anti cheats on Linux alongside Windows find the vast majority of cheaters on Linux.
Given this situation I think it's entirely reasonable to not support Linux if you're handing cheaters the game on a silver platter.
On Linux this can't work because a cheater can just build their own kernel with all the protections disabled or with intentional vulnerabilities. From what I've heard, statistics for games running anti cheats on Linux alongside Windows find the vast majority of cheaters on Linux.
Given this situation I think it's entirely reasonable to not support Linux if you're handing cheaters the game on a silver platter.