Both gumball and Adventure Time handled the concept of abusive or neglectful parents better than Steven Universe ever could’ve.
Martin Mertins is a literal deadbeat. He abandoned his NEWBORN CHILD. The show doesn’t pretend he’s gonna become a good person once Finn learns all this and forgives him. Finn forgives him but Martin doesn’t change. Finn wants nothing to do with him and Martin stays a villain.
Sure they later show that at the start he wasn’t all that bad despite being scum, after all what he did was an accident completely out of his control. He was never an abuser, or a psychopath or a super villain. H