It really did come off as that but in her own twisted way, she loved angel because he was able to “ see emi”. That’s what I know lol
in the beginning she definitely was using him to fulfill her own revenge, but in the final chapter she says that if angel can see emi's remilia for who she really is, then she can have the capacity to love him. I see it as since remilia has avenged emi, she feels more whole within herself and can start accepting angel's love (correct me if im wrong lol) she also feels this way through angel loving her and protecting her (and therefore emi's) dignity
tldr reread chapter 27!
The ending was really sweet and tied any loose ends. But maybe I missed it but did she ever actually fall in love with Angel? Ik she didn't hate him obviously but it definitely came off like she was just using him to solve her problems and didn't actually have any romantic feelings like he did.