I have installed the game through Lutris. while i get, with minimum settings and fsr set to performance, when i enter a match, at the start of the countdown i get around 100-110 fps but as soon as the round starts it drops down to 2-7.
1080p is the resolution i tested with borderless. once i get set it to fullscreen 720p it gets better but the stutter happens less frequently. In any case this makes the game unplayable.
PS: I installed it also through steam, I there i get much more stutter no matter what i do regarding the settings