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.
Ark. I have shitty rural internet so no online multiplayer for me. When I heard they were coming out with a single player I was SO excited. I could RIDE DINOSAURS. I could live on dinosaur island with my dinosaur friends!
Turns out it was less dinosaur island and more dying of dehydration and getting my dinosaur friends killed in new and exciting ways. Rest in peace, Tuber, Izzy and No Name, you will be missed.
Ah, seconding ark. I wanted a couple weeks after my friends jumped aboard the hype train, which lasted only a short couple weeks. A few years later and it’s free on EGS, a friend of mine owns a steam copy, and we cannot for our lives manage to connect a private game server between the two platforms. Basically first and one of the very few games I’ve ever refunded on steam, and not even worth playing for free from EGS.