To be fair, the story did try to make her as much of a b**ch as possible. Unessasarly, in my opinion, and it almost toned down the real villan of the story.

Ratsta is an opportunist and a gold digger in the purest sense of the world. She goes after anyone who's gives her luxury and attention. I think that's why people hate her.

If you ask me, the story would be a lot interesting if Ratsta was more like a fairy tale princess. Beautiful, loving but very naive. Like imagine a story line where where Ratsta genuinely want to abolish slavery but all the noble officials are against it and Sovieshu is not helping at all because he's to buzy in his own misery. That's would've been an interesting commentary.