Well, it could be possible in some really out - there fanfictions. Maybe some writers want to create a lot of drama. They might think that if Hermione's parents suddenly turn against her, it can add some really intense emotional turmoil to the story. But in the original books, Hermione's parents are really supportive.
She might throw herself into her studies even more. Since she has always been studious, she could use her academic pursuits as a way to distract herself from the pain of being disowned. She may also lean more on her friends in the wizarding world, like Harry and Ron, for emotional support.
Hermione could also distance herself from her parents a bit. If they are too stubborn in their hatred, she might choose to be with Ron regardless and limit her interactions with her parents until they come around. After all, she's a strong - willed character and won't let her parents' opinions control her completely.
This abandonment could make Hermione more independent. She might have to learn to fend for herself earlier, relying less on others for emotional support. It could also make her more distrustful at first, but as she grows, she might learn to open up again through the friendships she forms, like with Harry and Ron.
One interesting aspect of Hermione Granger and her parents in fanfiction could be exploring how their Muggle background affects Hermione's Hogwarts experience. In some fanfictions, her parents might be more involved in the wizarding world than in the original series, which adds a new dimension to Hermione's story.
In such a fanfiction, it would have a huge impact. Hermione would likely feel a great sense of loss and isolation. She might become more withdrawn and self - reliant. Her relationships with her friends at Hogwarts could also change. For example, she might be more hesitant to open up or more desperate for their acceptance and support as she has lost the most important people in her life in her muggle family.
The original Hermione is proud of her Muggle - born status and her family. In the 'Hermione hates her parents' fanfiction, this fundamental aspect is flipped. It creates a whole new set of character interactions and plot possibilities. For example, she might not be as eager to return to the Muggle world during holidays like she is in the original.
I really like 'Hermione's Muggle Roots'. In this fanfic, the author explores how Hermione's parents' occupations as dentists influence her in a unique way. It's a really heartwarming story that shows how much Hermione values her parents despite the differences between the Muggle and wizarding worlds. There's also 'The Granger Family Bond' which is all about the strong bond within the Granger family and how it withstands the challenges that come with Hermione being a witch.
In some fanfics, Hermione's abusive parents might be shown as neglectful. They could be constantly criticizing her intelligence or magical abilities. For example, they might not understand her love for books and learning magic, and instead push her towards more'muggle' - appropriate activities. This creates a contrast to her life at Hogwarts where she is celebrated for her brains.