Elaborate on these please and please tell me how that shows they don't look like shit aesthetically?
"Look like shit aesthetically" means what to you, exactly, and according to what standard? Kuma, for example, may look goofy and shitty to many people in comparison to the likes of Mihawk yet his aesthetics are virtually perfect. May I know your specific reasons why whatever Beast Pirate looks better than whatever Big Mom Pirate without going into vague concepts like "goofiness"?
Anyways:
Bobbin's calambur: the elements on his face compose the shape of an owl following his hypnotic powers, which at the same time is a creative usage of metonymy.
Cracker's polysemy: Cracker hides in an armor made of crackers which cracks and reveals a cracked-looking individual with hair like a firecracker.
Daifuku's conceptual analogy: a lamp filled with a genie is analogous to a filled mochi like the daifuku, which also provides round shapes fitting those of a lamp and which appears on Daifuku's artificial-looking anatomy.
Tamago's inspirations and rhetorics: Hercule Poirot, Jubjub bird, etc. appearing as an egg-looking individual with a sophisticated teacup as bowler hat and long legs which rhyme with his cane (the design has too many details to go into them here and now).
Mont-d'Or's irony: based on the scarecrow related to dumbness yet has the book fruit.
Perospero's hyperbole: obviously his long tongue which evokes his personality and powers.