>>109755067That's because Aku, while quite literally the embodiment of evil, is often shown in a humorous light. He toys with Jack, laughs at him, fucks up his evil plans sometimes, reads fucked up fairy tales to kids, etc. all while being given a stellar voice performance by Mako. You Aku is evil, but you enjoy him that way. He makes the series work.
By contrast, you see almost nothing of Pink but her childish cruelty and failures spinning out of control. You don't even get the pleasure of knowing what she sounds like very often. She exists solely as an indirect representation of bratty behavior causing trouble on a galactic scale. And so you are only left with reasons to hate her.
