So I watched the final episode of Samurai Jack last night, pretty decent ending and all tha', but after it finished I thought of somethin'...

Jack pretty much killed every single person he helped in the future.

Think about it. He defeated that Aku fella, and goes back to the past. This means every person he had to save in the future died because he wasn't there to save em'. I don't know if I would really call that a "satisfying ending"...