It could be that the author of the fanfiction wants to deviate from the original plot where Harry takes divination. Perhaps they think it doesn't fit with the new story arc they are creating for Harry. For example, if they are making Harry a more action - oriented character, divination, which is more about predicting the future in a rather abstract way, might not seem relevant to his character development. So they choose to have him not take divination.
In some fanfictions, the divination teacher could be portrayed in a negative light. Harry, being perceptive, might sense this and decide not to take the class. Or there could be a scheduling conflict in the fanfiction's universe that prevents Harry from enrolling in divination. Another possibility is that Harry has had some bad experiences or premonitions related to divination in the fanfiction, which makes him avoid it.
Maybe in the fanfiction, Harry has no interest in divination. He might be more focused on other subjects like Defense Against the Dark Arts or Quidditch.
Maybe he doesn't trust the teacher, Professor Trelawney. Her rather flamboyant and often inaccurate predictions might have put Harry off. He could see that her teaching methods lack the sort of solid foundation he looks for in a class, especially compared to more reliable professors like McGonagall.
Without Harry in Divination, new characters could emerge as more prominent in that class setting. They might have different reactions to Trelawney's teachings and predictions. Maybe there's a character who becomes really interested in Divination and starts to study it more deeply, leading to new sub - plots within the fanfiction.
Maybe because they are a big fan of the original 'Harry Potter' series and are tired of seeing really bad fanfiction. They want to emphasize that the real 'Harry Potter' is much better than those poorly - made versions.
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.
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.
Well, in some fanfictions, Harry might not trust Dumbledore because Dumbledore often keeps secrets. For example, he doesn't fully disclose the prophecy details at once. Harry could feel like he's being manipulated or not given all the information he needs to face the challenges. So, that lack of transparency can lead to Harry's distrust.
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.
In some fanfictions, Harry might not forgive McGonagall because she may have made a decision that Harry feels was a great betrayal. For example, if she sided with the Ministry when they were unjustly treating him. It could also be that she failed to protect him or someone he cared about in a crucial moment within the fanfiction's plot.
Well, it could be that in the fanfiction, Ron made a mistake that had long - lasting consequences for Harry. Maybe Ron accidentally revealed one of Harry's big secrets that put Harry in danger. So, Harry is unable to forgive Ron as it has changed his life in a negative way.
In some fanfictions, the author might want to create a new plot twist. Maybe they introduce a misunderstanding, like Hermione accidentally getting involved in something that looks suspicious to Harry. For example, if she's caught in a secret meeting that she can't immediately explain, Harry could start to lose trust.