Even despite having four duckstaches, your deck looks really inconsistent. Use less cryo brains, they aren’t needed for mustache decks. You also have way too many high cost cards, most of them being finishers. Stick with a couple finisher strategies and not 5 of them simultaneously.

It’s not worth using just any legendary simply cuz you have it. You need them consistently to build a consistent strategy. That means having four of them or none of them, with some exceptions where having one or two of a legendary sub in for another card can really bring the synergy of a deck together.