I wasn't even looking forward to it, but even then I found Evil Within disappointing. What a heap of garbage.
Pretty much every game this year that's been high profile/high budget has been creatively bankrupt, committee/focus test designed rubbish, or re-releases. Alien Isolation looks a lot better than I originally thought it would be, though.
There's been some decent indie stuff though.
You sound exactly like a friend I know...
As for my most disappointing, probably Destiny. I loved Bungie's Halo games, and I expected the same sort of storytelling from Destiny. Even playing the beta I figured they had just removed a lot of cutscenes and such in favour of just testing the gameplay. But then the impressions from the actual game came out and I took my money elsewhere.