Im using nvidia driver 495.44 and like i said, it used to work flawless some months ago, i did not change anything. Right now i changed the runner to a proton one (i think) its called lutris-ge-lol-6.13-3-x86_64 and it seems to be working again. Not sure for how long though since i thought i fixed it yesterday.
And yes i know blizz does not officially support linux, but i posted here since there are a lot of other players using linux that might ran into the same problem 