I'm leaning toward situational misogyny -- her major sin was being a femme character who 'got in the way' of the brooding hero. This aired during peek 'not like other girls' toxicity and I remember vividly how most fandom spaces had shippers leaning toward m/m pairings.

Because I definitely remember finding her annoying when I was watching when it aired on Cartoon Network in the 90s but I've seen clips of it recently and I don't have that well of dislike pooling up anymore (and granted it could be with age comes wisdom but I think its not just that).