well lets put it this way, most times i have a very negative score due to the fact that i rush almost most of the time screaming on my mic like a crazy person 2 secs before i die, or i run around glocking people in the head, or maybe it is because i run around with a nade in my hand straight into the enemy hoping for that sweet suicide nade which most times fail.
i dont know, but i thought games were meant to entertain people and bring friends together to have fun. so i have no idea why people rage quit, but they really need to start to try and lighten up. because if you are having trouble and getting angry at a game, then life is not going to get any easier.
so i would have to say, if games are getting you angry, i suggest finding a different habit, i find reading my thing, but thats just me.