SFV is probably my numer 2 game this year right after Hitman.
If I'm being totally honest I can't help but feel a lot of Jeff's dissapointment with SFV comes from the realisation that he'd need to put in way more time that he has available/patience for to become good at it.
I can't think of any specific game that really dissapointed me this year.
I guess maybe VR, which clearly isn't there for another decade, but I wasn't really that hyped on that to being with.
fake edit: just realized, most dissapointing for me is probably Microsoft's half-hearted apprach to the windows store.