Responses

What do you mean other world? She just kinda reincarnated but still same world. And yes, he did have a chance to start again but guess what? He's still hating her because of petty jealousy. And I wouldn't be quick to blame the other girl, she's also a victim of this stupid destiny (although she has faults, too). Compare the crimes of the the heroine and the prince, and I'm not dumbfounded why you're hating the former.
If you find yourself losing grasp or forgetting your hatred against that swine bastard they call prince (and later emperor), I recommend rereading chapters 1-6 again and you'll find your hatred to be as strong as ever,maybe even stronger.