hmm, i think it would be a close tie between dystopia au amon and idol au kidnapper

they're evil in quite different ways though.

amon is very self aware and he knows he is a selfish asshole, he just doesn't care. he can effectively put on a mask and pretend to not be as bad but he sees other people entirely as beneath him. he knows that him doing what he does to sol is morally wrong but he has along accepted it and he doesn't care about that.

amon is extremely evil in his actions but as a (fictional) person I cant really hate him because at least he is honest. i have a weak spot for awful characters that are fully aware of how bad they are, i admit XD

he is lowkey inspired in kanou from okane ga nai, but unlike kanou who mostly >tries< to avoid hurting ayase directly, amon actively gets off from hurting sol. he just gets really mad when ppl do it without his express authorization :p

kidnapper, on the other hand, was created to be not only evil but someone i would truly hate (even being in a fictional setting).

so yea, personally i do think he is worse.

he is the opposite of amon in the the sense that he truly believes himself to be a good person
he truly believes he is saving sol's life. he is so good at justifying his actions to himself that he really thinks that sol's "punishments" are something he only does out of necessity, for sol's own good, and not because he actively gets off to that.

in his mind, his extreme bigotry is not only justified, but logical. he isn't wrong, its the rest of society that is.

and, as i said before, he truly believes he is saving sol from that "fucked up world" as he sees it

i think that's what makes him such an infuriating character

another, uhm... interesting(?) thing about kidnapper is that he is actually kind of a good father to their kids. kiiiinda. he doesn't really do any of the actual work that raising a child involves, but he does try to spend time with them and be somewhat present. the kids genuinely like spending time with him and run to the door to say hi when gets home. basically he gets to be the "fun parent" and poor sol gets stuck with being the "nagging, annoying one" since he actually has to educate them.

which yes, is very fucked up.

anyway, he is a good parent to children and only children, once they turn into teenagers and start wanting some autonomy, shit starts going bad :p now suddenly sol is the good, reasonable parent in their eyes lol. well also because i assume teenagers are more aware of shit happenning around them than you'd expect. I'll stop talking tho, don't want to spoil the plot I have mind :p

anyway...

there's two other characters that could in theory compete with these two in awfulness which are ganenver's ex fiance and drover (from lie) but i haven't developed them that much yet so just know that the first one is more similar to kidnapper and the other acts in similar ways to dystopia au amon (but without the mafia boss type of money and influence or living in a dystopian society lol)