Linux is the perpetual scapegoat. They selected a middleware, Coherent UI, that didn't work properly on anything but Windows. They also didn't make proper use of the Steam runtime, a mistake that continues to cause issues. Most games don't make these mistakes, so this isn't really representative of the larger state of Linux gaming. It's worth pointing out that the devs did make a legitimately good attempt at making L…
The dev team struggled to get Coherent UI working on Windows, to say nothing of Linux. They switched to Coherent UI late in the development cycle and the beta/launch was constantly glitched out. The problem with trying to run an out-of-proc UI renderer within a game loop were so numerous -- the game would frequently lock up in full screen with multiple instances of the Coherent UI render process running if you managed to escape.
... in Windows, not in Linux.
For fans of TA and SupCom, early PA was terrible. Later, the team worked through a lot of the issues, but the damages to their finances (and reviews) were done and PA never got the e-sports league it deserved.