Alan Wake's American Nightmare lost me the moment it looped around on the first environment. I know it isn't a very long game, but doing those same areas two more times was not at all what I wanted from that game.
Remember Me was also a struggle to finish. The introduction of enemies who drained your health every time you hit them almost made me stop playing. The combat had become so easy that they had to bring in enemies who were designed to make you swap out your power moves for weaker moves and it really made combat slow to a crawl.