Quote from KoKo5oVaREven if the game is better than the previous one, they will be disapointed. Actually i think they just make up expectations
That's not true, at least for me. It's not difficult to make a good Thief sequel for instance. You take everything that worked in Thief 1 and 2 and you improve on it. If a team of amateurs did it, then an AAA studio can definitely do better. Instead they just chose to take everything that was wrong with Thief 3 and make it worse.
Hell the team had wide open doors to make something truly remarkable. They had a big lore just ripe for expanding (with several kickass shady factions left unexplored by Looking Glass), a level design model that worked (do more levels such as Assassins, The Cradle and Life of the Party and you'll get EVERY Thief fan happy) and keep Garrett the way he was. They did none of that.