Tryhard

n. someone who tries much harder to win than the average player
v. the act of trying much harder to win than the average player
adj. used to describe people as players who try much harder to win than the average player

I'm just trying to enjoy this game, but these tryhards are pestering me in chat to think harder and play smarter.
I stopped playing with Jim because he's just too intense to play with when he's always tryharding.
I used to watch tryhard pros on Youtube, but then, I asked myself what the point was and switched to watching funny Youtubers instead.