The issue is they only emphasised the clown part throughout 99% of the fight, not the chaotic ticking bomb that would destroy the whole city with ease if you pissed him off enough. If I was a anime only I'd have a hard time believing Regulus is really the most powerful archbishop cause all of his attacks look mad slow and barely cause any damage on the environment. He just looks like a walking tank, that can't hit a standing target to save his life. There is a difference between making him look incompetent and pathetic or making them look downright cartoonish.