It could be a way for some writers to gain attention. Since it's a rather shocking and controversial topic, they might think that writing such a fanfiction will make their work stand out. However, this is not a very ethical way of getting noticed. Another reason could be a misinterpretation of the characters' complex relationships. Maybe the writer doesn't fully understand the essence of Sasuke and Sakura's relationship and wrongly portrays it as an abusive one. Also, in some cases, it might be an attempt to subvert the typical happy - go - lucky or positive portrayals of relationships in the original series, but this is a very extreme way to do so.
Well, one possible reason is that some writers like to explore the 'what if' scenarios that are on the extreme end. They might think about how a character like Sasuke, with his troubled past and complex personality, could potentially act in a negative way towards Sakura. Another reason could be related to the freedom that fanfiction gives. Fanfiction writers can take the characters in any direction they want, and unfortunately, some choose to go in this rather disturbing direction. Some might also be influenced by other dark or edgy forms of media and try to incorporate that into their fanfiction, without considering the inappropriateness of it in the context of Sasuke and Sakura's relationship.
Some people might be exploring the darker side of human nature through these characters. They want to see how extreme situations can play out between Sasuke and Sakura.
It could be due to some fans' different interpretations of the characters. Maybe they see a certain chemistry between Sasuke and Karin in the original series that they want to explore further, even if it means creating a scenario where Sasuke cheats on Sakura. Also, fanfiction is a place for creativity and exploring different possibilities, and this is just one of the many extreme or different ideas that can come out of that.
There could be several reasons for the existence of such fanfiction. Firstly, it might be a form of creative exploration for those who want to test the boundaries of the characters' personalities. They may think that by putting Inuyasha in an 'abusive' role, they can dig deeper into his character flaws. Secondly, it could be an attempt to create a contrast. Since the original relationship between Inuyasha and Kagome is mostly positive, showing an abusive side can create a sharp contrast. However, this kind of fanfiction often goes against the general perception and liking of the majority of fans.
Some writers might create this type of fanfiction for shock value. They know that the original relationship between Rick and Morty has a certain dynamic, and by making it into an abusive one, they can get a strong reaction from readers. Also, it could be a form of expressing their own dark interpretations of power dynamics within the show.
Some people might create it just for shock value. They know that the original relationship between Goku and Chi - Chi is loving, so by creating something so opposite, they can get a reaction from readers.
One reason could be that some fans want to explore the darker aspects of a character's life in a fictional and extreme way. They might think it adds depth or a different perspective to the character. But this is a rather controversial approach.
One possible reason is that some fanfiction writers simply want to break the rules and norms of the original story. They see the established relationships as something to be toyed with, without considering the implications. Also, there might be a small subset of people who have some sort of personal issues or biases that they project onto the characters, leading to the creation of such a negative and untrue scenario in fanfiction.
Protectiveness. Sasuke has seen a lot of danger in his life. He knows Sakura is a valuable person, both as a friend and as someone he cares about. So his possessiveness could stem from his desire to keep her out of harm's way. He doesn't want any bad guys to get near her.
Some people might write it because they prefer other characters over Naruto, Hinata, and Sakura. They could be trying to promote their favorite characters by putting these three down in their fanfiction.
One reason could be the exploration of a darker side of their relationship. In the original series, Sasuke has moments of aggression towards Naruto, and some writers may want to exaggerate this for a more extreme story. Another reason might be for shock value. Writers may think that creating a story where Naruto is abused by Sasuke will attract readers who are interested in seeing a different and unexpected take on the characters.
One reason could be to create shock value. By having two main characters kill another important character, it grabs the reader's attention. Another could be to explore a very dark and alternate version of the Naruto universe. Maybe the writer wants to show how far characters could be pushed in extreme situations.