I had a similar experience with Broken Age. I was also a backer and followed the development with great anticipation, I remember every time a new backer update or DFA documentary episode dropped it felt more like a new Game of Thrones episode! Then came the game... split in two parts to make matters worse... and I felt pretty underwhelmed by it. It was just meh, no strong feelings one way or another. I think by then I was so exhausted by the development that I wasn't in the right mood to play the game anymore.
A few weeks ago I decided to replay it and I was able to have a fresh look at it, remembering very little about it. And it is a gorgeous little game, so full of details, a true labour of love. It is not without its flaws but at least this time I had feelings for it, positive for the things that worked and negative for those that didn't.
It's hard to understand how that game could leave me feeling so indifferent at the time. Expectations can really work against your enjoyment, I take it as a lesson to try to keep some distance with upcoming projects and our hopes in check.