I'm sorry, but it's a computer game, if you're not having fun, don't play, that's how you stop doing stupid things like that. I played Counter Strike online, the people I played against were better than me, and I kept dying pretty quickly, sucked the fun out of it, Half Life 2 deathmatch was different though and I played that until it got boring.
Dude, it's not the end of the world and it's really nothing to work yourself up about, there are much more important things in the world than losing a computer game.
But being annoyed is being annoyed and any one can relate, last night was our big May Ball event, my friend got so drunk he was annoying me quite badly, so I left him whilst he was watching one band to get some space from the man, otherwise I would have almost punched the guy and I'm not the violent sort.
So if you're ever annoyed, don't lash out, just take a break until you cool down and you'll feel much better.
"Experience never provides its judgments with true or strict universality; but only (through induction) with assumed and comparative universality." - Immanuel Kant