One reason could be jealousy. Maybe Hermione is getting more attention in school for her academic achievements, and Harry, feeling overshadowed, acts mean. For example, in some fanfictions, he might make snide remarks about her always having her nose in a book.
In some fanfictions, it could be because of outside influence. Like if there's a new dark force at Hogwarts that is subtly affecting Harry's mind. This force could be making him view Hermione as a threat, so he becomes mean to her. It's a way for the writer to create a new and exciting plotline that deviates from the original story. Another possibility is that Harry has some sort of premonition or false belief that Hermione will cause him harm in the future, so he starts being mean as a form of self - protection.
One possible reason could be miscommunication. Maybe Hermione is so caught up in her own thoughts and studies that she accidentally snaps at Harry without realizing how harsh she is. For example, she might be under a lot of pressure to do well in her classes and Harry's requests for help or just his presence might seem like an annoyance at that moment.
In some fanfictions, there might be a new magical element or prophecy that makes Harry question Hermione's motives. If the prophecy says something about Hermione being involved in a dark plot, even if it's false, Harry may start to have doubts about her.
Another reason could be a rift in their friendship caused by outside factors. For instance, if the wizarding community starts to turn against Harry because of false rumors or misinformation, Hermione might find it too difficult to stand by him. She may fear for her own reputation or safety, and this could lead to her abandoning Harry.
One possible reason could be a misunderstanding. Maybe Harry overheard Hermione saying something that he misinterpreted, like she was criticizing his actions but in reality she was just worried. For example, if Hermione was expressing concerns about Harry's risky adventures in a way that Harry thought was her doubting his abilities.
It's possible that Harry hates it because he has a certain image of Ron and Hermione in his mind. Fanfiction can sometimes create versions of them that are completely different from what he knows. For example, some fanfiction might focus on a love triangle that he doesn't think exists in their real relationship. This divergence from his perception could lead to his dislike.
Power could be a reason. If there's a chance for Ron and Hermione to gain a great deal of power by turning against Harry, some fanfictions might explore this. For instance, a new dark power might offer them something they've always desired, like the ability to reform the wizarding world in their own image. They might think Harry would oppose this, so they betray him to get what they want.
One possible reason could be jealousy. Maybe Hermione gets jealous of Harry's popularity or his special connection with other characters. Another reason might be differences in their approaches to solving problems. Harry could be more impulsive while Hermione is more methodical, leading to clashes. For example, in a situation where they need to rescue someone, Harry might want to rush in without a proper plan, but Hermione would insist on having a well - thought - out strategy first.
One reason could be to find peace. After all the chaos and war in England, they might just want to get away from it all and start fresh somewhere else.
One reason could be that Hermione is overly worried about Harry's safety. Since he's always in the middle of dangerous situations, she might think controlling his actions can keep him out of harm's way.
Well, in 'harry hates hermione fanfiction', it could be that the writer is trying to show how misunderstandings can lead to such extreme emotions. For example, perhaps there was a miscommunication about a spell or a magical event that made Harry wrongly think Hermione had betrayed him. Or it could be a way to explore how different personalities might clash more severely than shown in the original series, like Harry's impulsive nature conflicting more with Hermione's logical thinking.