Metal Gear Solid Ground Zeroes was a huge waste, honestly. Even at $20 that title would cost too much money. I've paid $10, full, for a game and gotten way more value out of it than that piece of crap.
Last year I really regretted COD: Ghosts. I found every single thing about that game to be garbage.
Battlefield 4 has been really, really, really, really pissing me off since about the end of....February? From the second that Naval Strike has been available the servers have been total garbage and my KDR has went from 1.23 to 1.19. I've thrown my controller once or twice from it. That was when I knew I just needed to stop and step away from the game for a bit and hope DICE/EA gets their crap together.
When I was a kid I would get pretty pissed off about Street Fighter.