Well, it could show that Harry gravitates towards the younger characters because they are more innocent and less likely to have ulterior motives like the adults. He may start to build a sort of 'youth alliance' in the fanfiction. They would support each other and rely on one another more than on the adults. Harry could be teaching them magic in a different way, a way that is not influenced by the adults' traditional methods, which he may distrust.
On the other hand, it could bring Harry closer to some characters who also have doubts about McGonagall in the fanfiction. They might form a sort of alliance based on their shared suspicion, which could lead to new storylines and developments in the fanfiction.
Maybe in the fanfiction, Harry has had bad experiences with adults. For example, some adults in the story might have betrayed his trust in the past, so he becomes wary of all adults.
McGonagall might notice Harry's distrust and feel hurt or frustrated. She may try to figure out what went wrong but find it difficult as Harry is not forthcoming. Their interactions become less warm and more formal. For example, in class, Harry may be less likely to ask for help from McGonagall, and McGonagall may be more strict with Harry as she doesn't understand his change in attitude.
His friends might be divided in their opinions. Some of them might still trust Dumbledore wholeheartedly and think Harry is overreacting. This could lead to arguments and a strain in their relationships.
The dynamic becomes very strained. Harry's lack of trust in Ron means that their usual banter and easy camaraderie is gone. Hermione will be stressed because she values both of their friendships. She may end up spending more time with Harry to try to help him through his doubts, which could make Ron jealous. Ron, on the other hand, might become defensive and start acting out, which only makes Harry trust him less. This could lead to a cycle of misunderstandings and a breakdown of their friendship triangle.
They could work together on a difficult task. By collaborating and seeing each other's skills and good intentions in action, Harry can regain his trust in Hermione. For instance, if they are in a dangerous situation and Hermione comes up with a clever plan that saves them both.
One possible reason could be that in the original story, many adults failed him. For example, Dumbledore, while having good intentions, often kept Harry in the dark about crucial matters. In fanfiction, this could be amplified. Harry might have seen adults make decisions that put him and his friends in danger without consulting them. Another reason could be that some adults in the wizarding world have their own political or personal agendas that conflict with what Harry believes is right, so he doesn't trust them.
Maybe he has been betrayed too many times in the past. For example, in the original story, some so - called friends or allies might have let him down, and this experience makes him overly cautious in the fanfiction.
Well, it might make Harry more isolated. In the original story, Dumbledore was like a guiding figure for Harry. If Harry doesn't trust him in the fanfic, he may not trust the advice Dumbledore gives about other characters either. So he might be more cautious around people Dumbledore was friendly with, like Hagrid. He might think they are also in on Dumbledore's secrets and not be as open with them.
It might show the constant power struggle between them. Harry, as a wizard, has an inner strength that the Dursleys try to suppress with their mundane and cruel ways. So it's a battle of wills.