I don't think you should hate it. Maybe you just haven't found what you like about it yet. Maybe give it another chance and look deeper into the story and characters.
To hate Mate manga could be because it doesn't match your expectations in terms of story development, character growth, or maybe it just doesn't fit your usual preferences. But sometimes, our initial impressions can be wrong. You might discover something new if you look again.
I think it might be because of the plot. If it's too predictable or uninteresting, that could make someone dislike it.
Maybe it's because they don't like the art style or the plot just doesn't click for them.
It could be betrayal. If one mate betrays the trust of the other, like lying or stealing from them, it can lead to rejection.
One reason could be the exploration of dark or taboo themes in literature. Some authors might be interested in delving into the extreme and abnormal aspects of human relationships, including sexual ones, to shock or provoke their readers.
I'm not sure there's a direct connection. Maybe they're just two separate entities with no significant link.
It could be that a very small number of people have a warped view of the characters. Instead of seeing the love and positive aspects of Edward and Bella's relationship, they want to explore a negative and inappropriate side for some strange or deviant reasons. However, this is not in line with the general perception of the story and its characters.
One similar manhwa could be 'Love Alarm'. It has similar themes of romance and drama.
The 'hate mate' manhwa might have a complex story involving characters with conflicting emotions and relationships.
Maybe she has some misunderstandings about you. It could be something you said or did that she misinterpreted. For example, if you made a joke that she took the wrong way.
It could be that Bahara simply finds the typical tropes in love stories to be overdone and cliched. All those predictable meet - cutes, misunderstandings, and grand declarations of love might seem tiresome and unoriginal to Bahara, making her hate love stories.