I thought he was just a greedy cunt whose motto was "Après moi, le déluge" like Louis XV's, but if he was avenging the innocent members of his family, it's a different story. Fuck Wano, fuck Kozukis and fuck the Scabbards, they all deserve to burn. They have added absolutely nothing of value to the overall story, and this arc would've been so much shorter and better if Luffy came to Wano only to beat up Kaido - which is the only thing everyone's been looking forward to for years. And the Supernova shenanigans, I guess. Yet another thing Oda is blueballing us with.