A common reason could be misinterpretation of his motives. Fanfic authors may not get his intentions right and make him seem more malicious than he actually is in the books.
Often, it's because of how his actions are exaggerated in fanfic. If he's made to be overly controlling or secretive in a fan - written story, readers might start to dislike him. For example, if he withholds important information from the main characters for no good reason, it can create a sense of frustration and hatred towards him. Another factor could be if he's made to be a foil for a more popular character in a negative way. If his actions are constantly pitted against the 'good' actions of another character in a way that seems unfair, it can lead to him being hated.
One common theme is self - discovery. Albus often has to figure out who he is apart from being Harry Potter's son. Another is friendship, like how he forms deep bonds with his peers at Hogwarts.
One reason could be secrecy. If Harry finds out that Dumbledore has been keeping major secrets from him all along, like about his family or his true role in the wizarding world, he might start to hate him. Another reason could be manipulation. If it seems that Dumbledore has been manipulating Harry's actions for his own gain, that would be a valid cause for hatred in fanfiction.
Well, in many Harry Potter fanfics about Albus Potter in RADS (I assume it means something like the Ravenclaw, Gryffindor, Hufflepuff, Slytherin system), Albus often faces unique challenges. He might be under a lot of pressure because of his famous father, Harry Potter. In some fanfics, he struggles to find his own identity within the school's sorting system and among his peers. He could be trying to prove that he's not just living in his father's shadow.
One common theme is the struggle with identity. Given his famous family name, Albus Severus often has to find his own place in the wizarding world. For example, in some fanfics, he tries to break free from the expectations set by his father.
One common theme is the burden of legacy. Albus Potter often has to deal with the high expectations set by his father, Harry. For example, in many fanfics, he feels pressured to be as great a wizard as Harry was.
One common theme is Dumbledore's past. Many fanfictions explore his family, his youth, and the events that shaped him. Another is his relationship with other characters like Grindelwald or Harry. And wisdom is also a big theme, as Dumbledore is seen as a very wise character in the original series.
One possible reason could be differences in their views on magic. Maybe Albus wants to explore a more radical or different approach to magic compared to Harry's traditional views. Another reason might be the pressure Albus feels living in his father's shadow. He could be lashing out in an attempt to assert his own identity.
Maybe Albus has done something dangerous or disobeyed Harry's instructions. For example, if Albus got involved with some dark magic related stuff without Harry's knowledge, that would surely make Harry yell at him.
Yes, he might. Fanfics can offer different perspectives on the Harry Potter world, and Albus could be interested in exploring those alternative stories.