Technically it was Toffee>he undermined the villain who was no threat>he kidnapped Marco and preared everything well>he made Star blow up her wand >he "infected" parts of the wand with his finger/soul>he guided Ludo into stealing the book of spells and opening the darkest page>he planned the whole shit long ago>he took the whole mhc by himself>he still has a plan>he fucked up the whole flow of magic
Star only cucked herself hard and embarassed herself with a stupid song. So, unlike many believe, Toffe is the one, who is responsible for the major shit. And Star - for minor only. And even then she tries to learn from her mistakes and do better next time.
So no, Mabel is still shit in comparisson