What could be the reasons for Sirius Black being fed up with Dumbledore in fanfiction?

It would probably become more strained. Sirius may start to distance himself from Dumbledore. He might not follow Dumbledore's orders as readily as before.

Sometimes, the plotlines in fanfiction can be a bit outlandish. If Ron is constantly getting into trouble in a way that Hermione has to constantly clean up after him, it would be understandable for her to be fed up. This could be different from the more equal partnership they had in the original series.

Perhaps Naruto is fed up with Konoha's fanfiction because he wants a new adventure outside of the village. He has spent most of his life in Konoha and might be craving for a change. He could be bored with the same old politics and power struggles within the village. Also, he may have realized that the ideals of Konoha are not as perfect as they seem, and this disillusionment makes him tired of it.

One reason could be that in some fanfictions, the characters of Team 7 are portrayed out of character. Naruto might be fed up if they make Sasuke too brooding in a way that doesn't seem true to the original. Also, if the fanfiction focuses too much on shipping within Team 7, like Sasuke and Sakura, and ignores Naruto's growth and importance, it could annoy him. Another possibility is if the fanfiction makes the team seem too dysfunctional in a way that doesn't match Naruto's view of his comrades.

Some fanfiction writers might make Sirius Black a Death Eater to explore the idea of redemption in a different way. If he starts as a Death Eater, then his journey to the side of good could be a more complex and interesting story. Also, it could be a way to add more mystery to the 'Harry Potter' universe by changing the nature of a familiar character.

Well, there are several reasons. Dumbledore is this all - knowing figure in the original series, but in fanfiction, his actions can be seen as manipulative. He might be making decisions for Harry without really considering Harry's feelings or wishes. Also, Dumbledore's grand schemes might not always be in Harry's best interest. Harry might realize this and get fed up. For instance, if Dumbledore is using Harry as a pawn in a bigger battle against Voldemort, Harry would likely be angry when he figures it out. And Dumbledore's failure to prevent certain tragedies, like the death of Sirius, could also be a reason for Harry's disillusionment.

One reason could be the strong bond between them in the original story. Fanfic writers might think that making them father - son would enhance that bond further. Also, Sirius was a very important figure in Harry's life, so it makes for an interesting twist.

One reason could be the strong bond between them in the original story. Fans might have felt that it could be developed into a father - son relationship in fanfic.

One reason could be that Hermione is under a lot of stress in the fanfic, and she takes it out on Sirius. Also, she might have some misinformation about Sirius that makes her think less of him. For example, if there are rumors going around about Sirius' past actions, Hermione might believe them without really getting to know him better. Another possibility is that Hermione is trying to assert her authority in a situation where she feels it's being challenged, and Sirius just happens to be in her way.

One popular 'Harry Potter Fed Up with Dumbledore' fanfiction could be 'The Breaking Point'. In this fic, Harry starts to see Dumbledore's manipulative side and decides to take matters into his own hands. Another one might be 'Beyond the Headmaster's Shadow' where Harry rebels against Dumbledore's control. There's also 'A Different Path' which explores Harry's journey when he loses faith in Dumbledore.