Okay, okay, there's no question that the mullet is a truly awful hairstyle. And, unfortunately, it has also been worn by a great many superheroes at one time or another, from Superman to Susan Storm Richards (though I would argue that the worst comic book mullet belonged to Dick Grayson).
HOWEVER, in my opinion, there is a far worse hairstyle that has regularly appeared in comics. It's THIS one:
I don't know the proper name for this particular hairstyle -- assuming it has a name. I usually call it "Wolverine hair," simply because Wolverine is the best-known character who has it. But it definitely has my vote as the worst superhero hairstyle of all time.
Now, I have heard a lot of other comic book readers complain about Wolverine hair over the years. Some try to blame either Marvel Comics or DC Comics for creating the style ("MARVEL did it first!" "No, no, DC did it first!") Others single out specific superhero artists for starting the unfortunate trend.
MY argument is that the style did NOT originate with a comic book company. It also didn't originate with a particular superhero artist. Nope, the person responsible for creating this hideous hairstyle was none other than Charles Schultz:
See? CHARLES SCHULTZ! It's all HIS fault!