Don't get me wrong, Modern Warfare 2 is a good game, but some of the stuff that goes on in multiplayer really ticks me off. Luckily, I haven't broken any controllers... yet. :P
 
-Dual 1887's. Who the heck at Infinity Ward thought this was a good idea? "Let's take one of the most powerful shotguns, and give players two of 'em!" Not only do these things have crazy ass range and damage, but you also look like a dweeb when you run with them.
 
-Boosting. Seems like every other free for all match I join, there's two kids in the corner boosting for one thing or another - the worst is when it's a nuke. If you can't get it legit, don't get it at all.
 
-Entering the match when one team is completely dominating. Because we all love joining a team that's getting their asses kicked, right? It's also fun to deal with the other team's two harriers, pavelow, and AC-130. /sarcasm
 
-Entering the match when it's basically over. I never really remember this being such a problem in Call of Duty 4. I'd rather not join a game for the last couple of kills, the last couple of ticks on the clock, or on a couple of occasions, the game-winning nuke. Then I need to sit through the final kill-cam, the post-match scoreboard, and the waiting time between matches for a game I didn't even really get to play in.
 
-"Real" camping. When I say camping, I mean sitting in a shadowy corner with Dual 1887's fixed on one door, and a claymore perched right behind the other door. This is especially bad, because most of the maps in Modern Warfare 2 have tons of houses/buildings.
 
-Glitching. Damn you, javelin glitch!
 
-Big maps in FFA. Sorry, but I don't want to play free for all on Quarry... or Wasteland. It's much too slow paced.
 
-Getting spawned right in front of, behind, or generally really close to an enemy. One of my biggest pet peeves. It really sucks when you start the game right in front of someone, and all they have to do is knife at the start of the match to get a kill (*cough* Rust *cough*).
 
-Painkiller death-streak. Seems like every time I'm a kill away from one of the higher kill-streaks, some guy with painkiller comes and guns me down. There's not really much I can do when the guy has three times as much health as me.
 
 Think there's anything I'm missing? Feel free to post your own!