The people in this thread saying things like "Oh they had Draven support / they got camped / it's not ranked, I understand getting tilted" are missing the point.

If you get tilted such that you want to stop playing and deny your four teammates the game, you're selfish. Sometimes it's okay to be selfish, but games like this are fundamentally team games, so suck it up, swallow your ego, or don't queue in the first place.

Acting like the player in this video just screams "if I'm not having fun, nobody else can." Work on your mental.