It could be a way for fans to express their own feelings about the unfairness in Naruto's original situation. They take it to an extreme with abuse in fanfiction to emphasize their point. For example, Naruto was already an outcast in the village to some extent, and the abuse in fanfiction is like a hyper - extension of that idea.
There are also those who write such fanfiction just for the shock value. They know that the Naruto fandom loves the character, and by creating a scenario where he is abused, they can attract readers who are interested in seeing a different, more edgy side of the Naruto world. However, this kind of writing should be done with care as it can be disturbing for some fans.
Some might write it for shock value. They think that by creating extreme and dark scenarios, they can get more attention. Maybe they feel that the normal Naruto storylines are too predictable and they want to create something 'edgy'.
Another reason could be for shock value. Writers know that the Harry Potter series has a large and dedicated fan base, and creating a story where the main character is abused can attract attention. However, this should be done with care as it can also be offensive or disturbing to many fans who love the original positive and inspiring nature of the series.
Some writers do it for the sake of creating unique and unexpected plot twists. Brainwashing Naruto goes against his usual character, so it can make for a very different and engaging story.
Some people write anti Naruto fanfiction because they want to explore different perspectives. They might not agree with the original story's direction or the character development of Naruto. So they create their own versions to satisfy their creativity.
People write 'Naruto Neglect Fanfiction' because it offers a different take on the original story. It allows them to explore how Naruto would develop if he faced neglect.
Some people write it for the sake of creativity. They want to explore different aspects of the Naruto universe that the original story didn't touch on. By making it dark, they can create a new and unique narrative.
People write 'naruto dead fanfiction' for various reasons. Some might want to explore different storylines that deviate from the original. Maybe they're curious about how the characters would react in such a tragic situation. It could also be a way to create more complex and emotional stories, as Naruto's death would have a huge impact on the entire 'Naruto' universe.
People write it because it's fun to mix two different and beloved fictional universes. Naruto and Leia are both iconic characters with their own unique traits. Combining them allows for creative and unexpected storylines.
Some writers might be inspired by their own feelings of saying goodbye in real life. They project those emotions onto Naruto and his world. Also, it could be a way to show how the characters would grow and change if they had to part ways. For example, a writer might want to show how Sasuke would react if Naruto really left for good. They use the 'goodbye' concept to dig deeper into the relationships and personalities of the characters. This gives them more creative freedom compared to just following the original storyline.
Some people write it to add drama. By bashing Minato, they can create more conflict in Naruto's backstory, which makes the story more engaging.