It's unfair to say it's the worst.

It might be a case of Stockholm syndrome but you guys forgot that before the rape happened, they were brothers who has a good relationship. We can think that the uke's change of mind was based on the happiness that the uke felt back when he cooked for the seme. They were living peacefully for 3 years before the rape. That can be a consideration he couldn't really hate the seme.

Try reading yaoi mangas tagged with PSYCHOLOGICAL then come back here to say which is worse. Some of Harada's mangas might give you an idea of worse situations.