There are a few reasons. First, Dumbledore was not a perfect character in the original series. He had his own agenda and sometimes kept important information from Harry. Some fans who write 'Dumbledore bashing Lord Potter fanfic' might want to explore how Harry, as Lord Potter, would react if he knew all the secrets Dumbledore was hiding. Second, it can be a way to create a more independent and assertive version of Harry. By bashing Dumbledore, they can show Lord Potter as a character who doesn't blindly follow authority. And third, it's just a creative outlet for fans who have a different view of the relationship between Dumbledore and Harry.
Well, in the original Harry Potter series, Dumbledore made some controversial decisions. For example, his handling of Sirius Black's situation. In 'Dumbledore bashing Lord Potter fanfic', writers might explore what would have happened if Lord Potter had been more aware of Dumbledore's actions. They might also think Dumbledore was too secretive, and in these fanfics, Lord Potter is the one to expose his wrongdoings. Also, some fans just like to explore different power dynamics and character interpretations, so they create these stories where Dumbledore is not the saintly figure he seems in the original books.
Some people write these fanfics because they feel Dumbledore had too much control in the original story. They see Lord Potter as a powerful character who could have made different choices without Dumbledore's interference.
Some fans might feel that Dumbledore was too manipulative in the original series. They create these fanfictions to explore an alternative view where his actions are not excused.
Well, in some fanfictions, Dumbledore is bashed because writers want to explore alternative storylines. They might believe that Dumbledore was too controlling. He made a lot of decisions for Harry without really consulting him. So by bashing him, they can create scenarios where other characters step up or Harry has a different kind of growth without Dumbledore's influence.
Some fans write it because they feel Dumbledore has some controversial aspects that the original books didn't fully explore. They want to dig deeper into his character and show the darker side that they think exists.
Another reason could be that they simply want to create a different narrative. Maybe they love the Harry Potter universe but feel that Dumbledore was too much of an all - knowing, all - powerful figure. By 'bashing' him in fanfic, they can introduce new plotlines and character developments that deviate from the original and offer a fresh take on the story.
One could be 'The Fall of the False Mentor' where Dumbledore is portrayed as having self - serving motives all along. Another might be 'Potter's True Path' which shows Lord Potter realizing Dumbledore's many manipulations. There's also 'Unmasking Dumbledore' which delves deep into his actions that are not so noble as they seem in the original series.
Some exist because some fans really ship Harry and Hermione (HHR) and feel that the Weasleys, especially Ron, are in the way of their ideal pairing. So they create fanfics to bash the Weasleys to make their preferred relationship seem more likely.
Some fans write it because they feel Dumbledore made a lot of morally ambiguous decisions. For example, his use of Snape was really rough on Snape. He made Snape endure a lot while using him as a spy. Fans might not like this and write bashing fanfics to express their dissatisfaction.
There could be a few reasons. Perhaps they have different interpretations of the characters. For example, they might think Dumbledore was too secretive and Hermione too overbearing at times. However, this doesn't justify bashing them. It could also be that they just want to create shock value or get attention with their fanfics. But in general, it goes against the essence of the original story.
Some exist because fans might feel that the concept of time travel in the Harry Potter series was not fully developed. They use bashing fanfiction to explore the flaws. For example, in the books, time travel seems a bit too convenient at times.
It could be that they simply want to explore different character dynamics. In the original books, Dumbledore is a very powerful and respected figure. By bashing him in fanfiction, they can create new power balances and relationships within the Harry Potter universe. This allows for a fresh take on the story and can lead to interesting character development that wasn't possible in the original story.