Are you talking about Baron Muno's daughter? The huge boobed girl with the talking pendant? The one who keeps jumping into battle only to bat away like a fly? That big boobed girl?
Yes
Then, no. Everyone hates her. And please keep in mind that I read the occasional harem and defend female characters that get unnecessary hate. So, please understand that they are truly a terrible character if even I wouldn't defend them. So, yes. Your hatred of this character is 100% justified.
Am I the only one who hates big boob girl? Like she's a little dumb, an inconvenience in a group fight and a fight in general, can't help with food other than eating it, like she can't do anything to contribute to the group. I pray for MC to just never marry/get into relationship with her. Family friend and that's it for her.