I think possibly Outlast for me. All the reviews I saw of it said it was amazing, but I couldn't get it into it. The enemies act like cliche stereotypes of crazy people, which would probably have been ok if they weren't all made to be obviously evil and monstrous looking. I've always thought the most terrifying thing about psychopaths is that they seem perfectly ordinary until you find their human eyebrow collection. None of that here.
Plus the big obvious set pieces quickly become absurd if you look at them for very long. I think the fact that nobody reacts to you in those bits is supposed to be creepy, but for me it just made it less threatening and kinda silly instead. It would have been fucking terrifying if the crazy guy just standing there banging his head on the wall suddenly turned round and attacked, or stared at you or something. But again, nope. It feels too fake. Kinda like when you see a picture of the actor playing the villain in a film, being all smiley and having a laugh with the other actors. It makes it much more difficult to take them seriously.
Basically, horror monsters either work when they're completely incomprehensible, like Alien the first film, Lovecraftian creatures, Slenderman, and so on. Or when they're completely believable, like real serial killers. When you're somewhere between the two, you risk losing both the fear of the believable threat, and the fear of the unknown. And that's what Outlast did.