Bear's upset because Wish Nikki can't ever be like the real one, his first choice is to ''slightly alter'' his wish instead of outright cancelling him when he thought he had that choice. When the real Nikki asks him to kill her he gets resentful over her not loving him. what
Neither Nikki nor Bear is a villain. There is no villain. It's just a sad, tragic story. And people can no longer differentiate between a flawed character and an evil person because they're incapable of processing things outside of the most black-or-white lens imaginable.