Whenever I struggle to defend something/someone, then suddendly, THEY FUCKING DIE ON THE CUTSCENE. WHAT WAS THE POINT OF USING MY BEST SKILLS IF YOU'RE GOING TO BLOW UP ANYWAYS.
That's plain fucking stupid!
OP Skills that you only get twice in the game. If I use them, I feel like I'm cheating or something, because I made something impossibly hard so easy that I actually felt ashamed of myself; otherwise, I just save them until FINAL-BOSS-BATTLE-LAST-PHASE-ULTIMATE-DEATH-FATALITY-OF-DOOM-AND-BLOOD, use them, and turns out, IT DOESN'T DO SHIT.
Cheap Tactics. Like, repeating the same attack over and over because you know it is un-blockable and it's so fast that you can't avoid it.
Repeating quests. Doing a different playthrough of the game, and they force you to do the same little annoying quests that you MUST do even though you already know, they are fucking pointless.
Stupid Quests. Whenever you see a big sign that says "SHOOT FIREBALL ONTO TARGET TO PROCEED" and you can't because you haven't talked to the correct NPC or you don't have the spell "FIREBALL THAT CAN ONLY ACTIVATE THE TARGET" that it is exactly like "REGULAR FIREBALL" but it has scripted to activate the target.
Sudden Deaths. You're on a FPS, taking heavy fire, behind chest-high-walls, you finally kill the last son-of-a-***** after hours of exchanging bullets, and you accidentally fell through a hole, and die, and have to kill everyone AGAIN. Or worse, you get stuck and you're forced to repeat the scene.
Unskippable Cutscenes. HAS ANY GAME DEVELOPER HAVE THOUGHT "Hmm, maybe they'll play this game more than once, and they don't want to watch the same old shit over again, right?"
Voice Acting and Lip-Syncing. This is more of a personal thing, but I dislike when they put little girls on video games, and when you hear them talk, they talk like they were 40-year-olds (Unless it's justified, like, she's possessed), and the voice doesn't match the lips, it just pisses me off.
Stupid Enemy Shit. "Hehe, we're going to stand right out of sight, and shoot you in the back of your spine"