I would say assassins creed unity was the biggest let down for me. When I got the game I couldn't take part in the co-op, I couldn't play the game for five minutes without a single glitch, these weren't little glitches. I died because my character just stood there, he got stuck on random objects (random climbing on things and no moving), I fell through the world all of the time. Although destiny had its problems, I didn't have that many issues with it! Sure I got booted from the game from time to time and the raid has issues but if I logged back in I could still play the game without the same problem over and over again.