The game runs at 60 fps in the menus, but in races it runs around 20-30fps, which makes it unplayable. I have tried everything: changing the Proton version, graphics drivers, launch parameters, I have even changed my OS from pure Arch to CachyOS (very good distro, by the way). When I made this last change it worked fine, but it went wrong again as soon as I restarted the PC.