I'm not entirely sure specifically as it could vary greatly. 'Sasunaru' likely refers to a relationship between Sasuke and Naruto in a fan - created context. 'Abused' in this title might suggest a dark or difficult situation within the fanfiction, perhaps one character is being mistreated by the other in some way, but without reading it, it's hard to be more precise.
He might be shocked. In the fanfic, if he sees things like his friends' future achievements or the new threats that emerge, it would surely startle him. For example, if he discovers that one of his friends has a family of their own and has become a great leader in the village, he would be proud but also a bit surprised at how much has changed.
One common theme is the exploration of the alpha - omega dynamic between Sasuke and Naruto. It often involves Sasuke being the alpha and Naruto the omega, and how they interact with each other in this relationship.
One scenario could be that Naruto gets hurt while trying to save Sasuke from a dangerous situation. Sasuke then feels guilty and starts to realize how much Naruto truly means to him. In the fanfiction world, this might prompt Sasuke to be more open about his feelings towards Naruto, which could range from deep friendship to something more romantic. The hurt Naruto endures can be a turning point in their relationship, making Sasuke re - evaluate his actions and priorities.
One popular 'sasunaru' fanfiction could be 'A Bond Tested'. In it, Sasuke's actions towards Naruto might be misconstrued as abuse in the complex relationship they share. It delves deep into their emotional turmoil and how they overcome it.
It could be that in the fanfiction, Naruto's character is developed in a way that Sakura, within the sasunaru concept, doesn't approve. For instance, if the fanfiction makes Naruto too weak or too different from his original self. Also, if the fanfiction focuses too much on certain relationships that she doesn't like, she would hate it.
One great Sasunaru Naruto fanfic is 'A Bond Beyond Comprehension'. It beautifully explores the deep relationship between Sasuke and Naruto. The story has amazing character development and the plot keeps you hooked from start to finish.
In some Sasunaru fanfictions, Sakura might hurt Naruto emotionally. For example, if she chooses Sasuke over Naruto in a very cruel way, it can break Naruto's heart. She could say mean things about his dreams or his past as an orphan, which would deeply wound him.
With his usual determination. Naruto has always been one to face difficulties head - on. So, even if he's shocked by what he sees in the fanfic's future, he'll likely try to find solutions immediately.
It could mean that in the sasunaru (presumably a relationship concept within the Naruto fandom) context, the character Sakura has a dislike for Naruto fanfiction. Maybe it's because the fanfictions often deviate from the original story in ways she's not fond of.