One possible reason could be the betrayal he faced from some people in the wizarding world. For example, some students at Hogwarts might have spread false rumors about him or treated him unfairly because of his fame as 'The Boy Who Lived'. This could have led him to develop a general dislike for humans.
Well, it completely flips his character. Normally, Harry is seen as a hero who is kind - hearted and protective of his friends and the wizarding world. In this fanfiction, he becomes a much darker and more jaded character. His hatred for humans makes him more of an anti - hero or even a villain - like figure in some ways.
This idea completely alters the perception of the Harry Potter universe. In the original, Harry is at the center of a community of friends and allies. If he hates humans, that community is shattered. It also changes the way we view the magic world's relationship with the non - magical world. Harry was always a bridge between the two, but if he hates humans, that bridge is broken. It creates a much more fractured and less hopeful view of the entire Potterverse.
Perhaps in this fanfiction, the author has imagined a completely different backstory for Harry. Maybe he was somehow mistreated by humans in this alternate story from a very young age. This continuous abuse or neglect could lead to him hating humans. But in the official Potterverse, Harry is a symbol of love and hope and friendship among humans, so this is a huge deviation. It could also be that the writer is exploring some complex psychological concepts by making Harry hate humans, like the effect of long - term isolation or extreme trauma on a person's view of humanity.
There could be such a 'harry hates humans fanfiction'. However, it's not a very common or mainstream concept. It might be a more niche or dark take on the character. Maybe some independent authors have explored this idea, but it's difficult to point to one without really delving deep into the fanfiction communities and their libraries. It could also be that this is a very specific or even self - created concept that hasn't been widely explored in the general fanfiction world yet.
One possible plot could be that Harry has been repeatedly betrayed by those he trusted, all of whom are humans. This string of betrayals causes him to gradually develop a hatred for all humans. He might then go on a journey to isolate himself from human society and seek revenge on those who wronged him.
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.