i cant stand one trick ponies they ruin the game

For one they always think they are better than everyone else because they have played their champ alot when most of them are not even diamond which means they still dont know how to play their main champ proficiently. So now im stuck with a feeding one trick whos getting shit on by bad players and im stuck in a 20 min losing game because he cant have a brain and pick an ap champion and hes useless on what hes on lmao. having a one trick increases your chances of losing not winning