Well, this kind of fanfiction might be an interesting take on the character. It could explore a darker side of Harry Potter that we don't often see in the original series. Maybe the author wants to show how all the pressure and trauma he has endured could lead to a more cynical view of those around him.
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.
Yes, there might be some out there. Fanfiction is a vast and diverse world where writers explore all kinds of alternative scenarios. Some writers may create stories where Harry Potter hates Dumbledore for various reasons, such as feeling manipulated or betrayed by Dumbledore's actions. However, this goes against the general relationship portrayed in the original books, which is why it's an interesting and somewhat controversial topic in fanfiction.
One possible impact is that it can divide the fandom. Some fans who love the original relationship between Harry and Hermione might be put off by such fanfiction. On the other hand, it can also attract new fans who are interested in seeing this new take on the characters.
Perhaps Dumbledore is shown to have a secret alliance with Voldemort in the fanfiction. Harry stumbles upon evidence of this and is filled with rage and hatred. Or maybe Dumbledore had been manipulating Harry's emotions and actions from the very beginning to fit his own plans for the wizarding world, and once Harry realizes this, his hatred for Dumbledore grows. It could also be that Dumbledore has been hiding a powerful magical artifact that could have saved many lives but didn't, and Harry blames him for it.
One possible reason could be a creative twist by the author to explore different relationship dynamics. Maybe they want to create conflict and drama. For example, the author might make Harry misunderstand Ginny's actions or intentions, leading to this false sense of hatred in the fan - made story.
Maybe some people just want to explore a different and darker side of their relationship. In fanfiction, creators often take liberties to show complex emotions that might not be as obvious in the original books. Harry hating Ron could be a way to create drama and new storylines.
One characteristic could be a complete deviation from the original story's relationship dynamic. It might also involve a lot of angst and conflict. For example, the fanfiction could focus on how Ginny is affected by Harry's hatred, and how she tries to deal with it.
One possible theme could be betrayal. If Harry hates Ron, there might be a backstory of Ron doing something that made Harry feel deeply betrayed. Another theme could be jealousy. Maybe Ron has something that Harry desires, which leads to this hatred.
Yes, there might be some out there. Fanfiction is a vast and diverse world where writers explore all kinds of alternative scenarios. However, this goes against the core friendship in the original series. It's like a dark, twisted take on the relationship between Harry and Ron.