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.
In some fanfiction, Harry might not trust Dumbledore because the author wants to explore different power dynamics. Maybe they show Dumbledore keeping too many secrets, like about Harry's past or the true nature of the threats he faces. This secrecy can make Harry feel manipulated and thus lead to a lack of trust.
One possible reason could be that Harry discovers some hidden actions of Dumbledore that seem manipulative. For example, if Dumbledore has been keeping secrets about Harry's past or his destiny without fully explaining them. Harry might feel used or deceived, leading to his distrust.
One possible reason could be that Harry discovers some secrets that Dumbledore has been keeping from him. Maybe Dumbledore has been making decisions about Harry's life without his knowledge, like how he was set up to face Voldemort. This lack of transparency might lead Harry to lose trust in him.
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.
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.
In the fanfiction, the plot might develop with Hermione secretly investigating Dumbledore. She could enlist the help of other characters who also have doubts. As she uncovers more secrets, her distrust grows, and this causes a rift within the group of friends. Some might side with her, while others still believe in Dumbledore. This creates a lot of tension and conflict as they try to deal with the threat of the dark side while also dealing with their internal differences.
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.
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.
Maybe he has read some really bad Order fanfictions before that were full of inaccuracies or out - of - character portrayals, which made him lose trust in this type of fanfiction.