The most disappointing one for me was - and it's not even close - Resident Evil 3 Remake. Such a waste of a good game. I still rather play the original, even without mods, but hell, if you add a HD-texture mod to Resident Evil 3: Nemesis it's a great game, in gameplay and looks alike, not the shitfest the Remake was. I even originally casted my vote as "yes" for Cyberpunk, because my head just didn't want the Resident Evil 3 Remake to be real.
But Cyberpunk holds the second place, although there weren't many games I was looking forward to in 2020, which made this an easy one if it wasn't for Resi 3. Still I wanted more polish, not necessarily more RPG or more story, but the way the game was released was scummy to say the least. To this day I think that the last gen console versions shouldn't be for sale as they are still way too unstable. And even the PC version, which is what I own, is just plain unfinished, although that is playable, at least for me it was.