You didn't even give reasons why 4e killed your interest
Because it isn't up to debate. If I started listing reasons why 4e killed my interest, all it would do is invite people to argue with each point, and say, "no, this was a *good* change", when none of it would make the game any less dead to me. You can't argue me into liking 4e by arguing each of the points why I dislike it. Hence, listing those points is a waste of time.