Am I the only one that feel that it is a good ending actually?

That world is not where they suppose to stay, its for people to fulfill their wish and move on.
Maybe people feel sad because of otonashi's yelling and tears after tenshi disappear. (i agree that scene is abit sad)
However I think that was just his impulsive move(confess to tenshi), if hinata didn't volunteer to go first, otonashi will simply disappear, and he didn't have to go through all the pain. In other words, otonashi sendiri gatal, cari pasal

But in the end they still manage to meet back each other in the real life.
So the current path isn't bad at all imo.
Another question appeared, what will happen to tenshi if otonashi leave before hinata? since she cant fulfill her wish now.
Hinata x Tenshi?

well you are not alone... i think its ended nicely, but just kinda rush... still acceptable for me...