Man, people don't get it. Everyone saying the ending is terrible don't get dale's character. It tells you in the title itself what he is like "If It's for My Daughter, I'd Even Defeat a Demon Lord". Dale will do literally anything Latina asks him to do, so if she asks him to kill a demon lord he will do it. This is why the ending happens, because she asked him to, and he can never ever say no to her.