Well, they might be too caught up in the real events of their wizarding world. Fanfiction often takes creative liberties that could seem far - fetched to them. They've lived through the real Harry Potter adventures, so the made - up stories in fanfiction just don't seem believable.
Well, it could be that in the fanfic world, the writer wants to add some drama. So they make Hermione not believe Harry. It could be because of new characters introduced who spread false rumors about Harry, causing Hermione to be skeptical. Also, it might be related to some secrets Harry is keeping that Hermione discovers in a way that makes her question his honesty.
Maybe in the fanfic, Harry has done something that goes against Hermione's principles. For example, if he made a hasty decision without considering the consequences, Hermione, who is rational and thoughtful, would find it hard to believe him.
Maybe he's read too much of it and found the plots repetitive. Fanfictions often follow certain patterns, and after a while, it can get boring.
In some fanfictions, Harry might be angry with Ron and Hermione if he feels they are keeping secrets from him. For example, if they discover something important about Voldemort's plans but don't share it right away, Harry could get angry. He's used to relying on them and when that trust is broken, even if it's a misunderstanding, his anger can flare up.
Some writers might create such fanfiction for the shock value. They want to break the established strong friendship in the original series to get readers' attention.
Perhaps Harry hates Ron and Hermione fanfiction because it can create false impressions. In the real world, their relationship is based on deep friendship, loyalty, and shared experiences. Fanfiction might deviate from this by adding out - of - character scenarios or relationships. Harry, who has been through so much with them, might not like seeing their story being told in a way that doesn't ring true to what he knows.
It might be because of a misunderstanding. In some fanfics, a false rumor could spread about Harry. Ron and Hermione, believing it to be true, might decide to distance themselves from him. Say, there's a rumor that Harry is involved with dark magic in some way, and they, being the 'good guys', think they need to stay away.
Maybe she doesn't like the way some fanfiction writers portray their relationship. Fanfiction can often take characters in directions that are not in line with the original essence of the character.
Maybe teachers consider Peter fanfiction as something not based on facts or academic knowledge. They are more inclined to believe in materials that are verified and have educational value.
Well, it's simple. In the fanfiction world, Ron is sometimes portrayed as jealous because Harry is the famous 'Chosen One' and Hermione is super - intelligent. When they spend time together, Ron may think they are forming a clique without him. He's also a bit insecure, and seeing Harry and Hermione's camaraderie might make him fear that he's not as integral to their group as he wants to be. So, that jealousy pops up.