I saw a post in the jjba tag about a week or so ago, that said something like
“Why do most people hate Anasui but like Yukako? they’re basically the same character! If Anasui was a lesbian I bet everyone would like him then uwu"
I’ve been thinking about it lately and it’s like… honey… Yukako actually becomes a better person after the incident (or at least, she stops being a destructive asshole towards Koichi), Koichi accepts her and returns her feelings, and they become a cute and happy couple.
Anasui on the other hand never gets over his obsession with Jolyne, or his hostility at anyone that tries to get close to her, and Jolyne never returns his feelings so their relationship goes nowhere…
And there’s the fact that Anasui’s a murderer and is fairly older than Jolyne; the latter doesn’t REALLY matter since Jolyne is of legal age, but still: his situation with Jolyne is very obviously different from Yukako’s.
…This doesn’t have anything to do with gender either? I’ve seen plenty of people who dislike Yukako because of how her kidnapping thing was never properly resolved, and plenty of people still love Anasui anyway, just like how terrible characters like all of the villains are adored in the fandom.