Why do I suck at multiplayer arghh

[2218]

It sounds like you need practice first and foremost. Personally, what I find sets the great players apart from the good ones is how they see the game. It's a lot like poker. Think about what you're doing and why you're doing. See if there's a better option available. Look at what other people (particularly the better ones) are doing. Take note of the strategies that frustrated you the most and try to adapt them into your own game.

I'm one of the uppper echelon halo 3 players, but every now and then, I'll face some guy who will mop the floor with me. Yes, his accuracy is better, and that accounts for a bit, but at the end of it, I look back and am amazed at how thoroughly I was leveled over and over again.