I was starting to lose hope, but little did I know that by changing my mentality everything suddenly clicked, it may seem obvious but you need to be concentrated on the game and nothing else, treat each round as a new game, I find it stressful watching the score of the game or even my own score or teammates, and most importantly you need to don't give a fuck quite literally, don't think about the bad play that your teammates do and focus on you and only you.
Maybe this was a thing you already knew but I just wanted to tell this cause this is what it helped me and maybe can help someone else in my same status some week ago.

:D