A game that has a central purpose of killing, and you can't kill when you should be able to and you are killed when you shouldn't have been, makes it annoying to play.
Examples including clubbing first but being downed, molotoved/bombed with full armor/health but your downed, direct throws of bombs/molotovs just knocks opponent armor off, shot behind cover and around corners, aim reticle on target but your bullets don't register, down opponents only for them to get back up on their own, triangle button with shiv option on screen will open box, revive, special execute before you can actually shiv. Etc...
The good stuff in this game far out-weighs the bad in my experience. Even players like memphis that play the game constantly and come to the boards to complain constantly still must get some joy out of playing.
Well, at least this thread was positive. The devs work really hard on making stuff that'd suit everyone, i wouldn't want to be a dev if all my hard work would result in a community like ours, i guess that's why they don't come here as often. At least they get a lot of money for it.