Personally there are a few games which left me very dissappointed, after hyping myself up for years in certain cases.
Divinity Original Sin: turns out I prefer more streamlined, less packed games (love Pillars of Eternity) and that coop play in a CRPG stresses me out.
Wasteland 2: I actually managed to finish this one but secretly I admit I was hoping for a better Fallout which I didn’t really get. New Vegas did the cowboy theme much better.
INSIDE: while the design was cool, it was just a ton of boring, easy puzzles in comparison to LIMBO, its predecessor.
There was one fight against a boss that was a huge pain in the ass because he tackles you just as you exit a door to the roof and if you don’t use the right maneuver, blam! you have to restart and listen to his monologue. Again and again and again. Dear gods, it was so bad it’s actually the only thing I remember from the game.
Which is a damn shame because it really was revolutionary, the architecture is fantastic, and the parkour is flawless. Even the “you don’t have to fight” thing was genuine! I literally did not fight a single guy… until that damn roof, where I suddenly had to learn the parry maneuver the hard way. Shame.