10-15 fps in game

I bought the game a few days ago, played for like 2 days with no problems other than the occasional connection issue that solved itself within seconds, but yesterday i started experiencing problems with the game, I couldn't play the game because when i got in the match it would drop to 5-15fps for no reason, I would restart the game once or twice and it would get fixed and I could play again, tried to play today to no success, I restarted the game like 20 times, it always lags when i start playing, tried everything, still wouldn't work, so I'm curious if I spent 55 euros on a game just to play it for like 2-3 days.

Is there a fix for this that actually works or I spent money on a game just to have it in my library?