He may dislike it because he values the authenticity of his own adventures at Hogwarts. Fanfiction can be full of wild speculations and interpretations that don't match the reality he lived through. He has his own understanding of Hogwarts, its secrets, and the people there. And seeing it being rewritten or reimagined in fanfiction in ways that he doesn't agree with could be off - putting for him.
Well, it could be that Harry has such a personal and intense experience of Hogwarts that he doesn't like how fanfiction can be so varied and not always in line with his own memories and feelings. He might feel that the real Hogwarts story is already perfect as it is, and fanfiction is just an unnecessary addition that doesn't capture the essence. For example, he might not like how some fanfictions change the relationships between characters or create out - of - character scenarios for his friends at Hogwarts.
Maybe in the fanfiction, Harry has some bad experiences at Hogwarts before. For example, he might have been bullied by some students or had a really tough time with certain teachers. So he doesn't want to go back.
It could be that in this fanfiction, Harry has found a new place outside of Hogwarts that he feels more comfortable in. He might have made new friends or discovered new magic that he can't practice at Hogwarts, so he doesn't want to go there.
Well, in some fanfictions, the author might want to create an alternate scenario where Harry has different relationship dynamics. Maybe they want to explore other pairings for Harry and so they write him as not liking Ginny to deviate from the original storyline.
Maybe in those fanfictions, the author portrays McGonagall in a way that Harry doesn't like. For example, the character might be out of character and act too harshly or differently from how he expects her to be in the original story.
Maybe Harry thinks fanfiction often distorts the real relationship between him and Ron. He values their genuine friendship and doesn't like the fictional and sometimes over - the - top interpretations in fanfiction.
It could be that Harry has a very specific and personal view of Mcgonagall. The fanfictions often add a lot of fictional elements that deviate from his own perception of her. For example, they might make her act out of character in terms of her strictness or fairness, which he doesn't like.
Maybe in some fanfictions, Dumbledore's character is portrayed in a way that Harry doesn't like. For example, if the author makes Dumbledore overly controlling or having some hidden motives that are against Harry's interests.
Hogwarts is a well - established and copyrighted world within the official Harry Potter series. Fanfiction often takes creative liberties that might not align with the original concept of Hogwarts as envisioned by J.K. Rowling. So, it's not a proper place for fanfiction in a legal and purist sense.
Harry Potter has his own moral compass. Ginny is an important person to him. The idea of slutty Ginny fanfiction is disrespectful to her character. Harry has seen Ginny grow and develop, and he knows her true self. He doesn't want her to be objectified in such a vulgar way in fan - made stories.
Maybe he doesn't like the way his character is often misinterpreted or distorted in fanfiction. Some fanfictions might take his character in directions that he would find unacceptable or disrespectful.