Worst ending (spoilers)

I believe the episode is called "the spirit in the bottle" first the kid disrupts a demon, then he gets greedy, then his father DIES, and after all that he ends up getting tricked by the SAME demon and is trapped in the bottle for the rest of his life while the demon is running loose in the world?!? What the hell? God. The kid should've learned his lessons but he didn't deserve THAT. Worst ending ever! -_-