It could be that Ron is having a bad day or going through some personal issues. And instead of dealing with them in a healthy way, he takes it out on Hermione. For example, if he's feeling insecure about his place in the group, he might lash out at her.
Well, Hermione might choose to simply ignore Ron at first. She's got a lot on her plate, like her studies and helping Harry. But if he continues to be a git, she'd probably use her intelligence to outwit him in some way. Maybe she'd come up with a really clever comeback that would leave him feeling stupid. She could also choose to distance herself from him, like spending more time with other friends or focusing on her own projects.
Perhaps in the fanfiction, Ron's jealousy gets the better of him. He might be jealous of Hermione's success or her friendships with other characters like Harry or some of her academic peers. His jealousy could manifest in ways that make Hermione feel suffocated or unappreciated, causing her to end the relationship. Also, Ron may have some habits that Hermione can't tolerate anymore. For example, his slacking off on certain responsibilities or not taking things as seriously as she does.
Hermione might start to distance herself from Ron. She could avoid sitting next to him in class or at meals, and stop including him in her study groups or other activities.
It could be that Ron makes some rude comments about Hermione's intelligence or her Muggle - born status in the fanfiction. Hermione is very proud of her intelligence and heritage, and if Ron were to belittle her in any way, she would surely start to think of him as a git.
In Ron Weasley and Hermione fanfiction, a common characteristic is the re - imagining of key moments in their relationship. For instance, how they might have first kissed or confessed their feelings differently. There's also a strong sense of loyalty in these stories. Ron and Hermione are shown to be loyal to each other through thick and thin. And the fanfictions often play with the idea of their future. Whether it's their careers, having a family, or their place in the wizarding community, these aspects are explored in different and creative ways.
Maybe it's because the fanfiction portrays Ron in a way that she doesn't like. In the original story, she has a complex relationship with Ron. If the fanfiction distorts his character too much, it could be off - putting to her.
In some fanfictions, Ron might be depicted as having a controlling influence over Hermione, but this is not a universal portrayal. Fanfiction is a vast and diverse genre, and different authors may explore different relationship dynamics between the characters.
A popular Ron Weasley and Hermione fanfiction is 'Hermione's Choice'. In this story, Hermione has to make some tough decisions regarding her relationship with Ron while they are on a dangerous mission. It's full of action and emotional turmoil. There's also 'Ron and Hermione's Love Story Unveiled' which tells their love story from the perspective of their friends, giving a different and interesting view. 'The Secret Romance of Ron and Hermione' is a fun read that focuses on their secret moments of affection during their school years.
In fanfiction, this kind of plot twist can be really interesting. It might be due to the author wanting to explore different character dynamics. Maybe Hermione realizes she has a stronger connection with Sirius in terms of his more adventurous spirit or his different life experiences compared to Ron.