In fanfiction, why would Sakura injure Naruto?

One reason could be jealousy. If Sakura shows too much interest in another character, Naruto might feel jealous and punish her in a childish way, like ignoring her for a while.

One reason could be for the sake of the Naruhina relationship. To make Hinata seem like a better match for Naruto, the writer might make Naruto hate Sakura. For example, if Sakura is written as being too pushy or bossy in the fanfiction, Naruto could start to dislike her.

In some fanfictions, Naruto might be influenced by an external force. Maybe a villain has the ability to manipulate emotions, and they target Naruto, making him lose control and hit Sakura back. This then sets up a story arc where Naruto has to overcome this external influence and make amends with Sakura.

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 possible reason could be for the sake of creating a more complex love triangle in fanfiction. Maybe the writer wants to explore a different dynamic where Naruto and Hinata's relationship is strengthened by having a common dislike for Sakura. It could also be that the fanfiction writer is trying to give Hinata more agency and make her a stronger character by having her oppose Sakura in some way, perhaps in matters related to Naruto's affections.

In some fanfiction, it could be related to a misinterpretation of character relationships. Maybe the author has a skewed view of Naruto and Sakura's dynamic and decides to create a tragic and unexpected turn of events where Naruto kills Sakura to show the breakdown of their bond.

Well, Naruto has a very warm and persistent personality. He's always there for his friends, and he has a big heart. In fanfiction, Sakura might see these qualities in Naruto and realize his true value. He's the kind of person who can make her laugh and feel safe, which could be very appealing compared to Sasuke's more brooding nature.

One possible reason could be that in some fanfiction, Naruto might be written to hate them because of their early treatment of him. Sakura was often dismissive of Naruto in the beginning, and Ino was more focused on Sasuke too. So in a different narrative, Naruto could hold grudges against them for not seeing his worth initially.

The reason why Sho had injured Dylin was because Dylin had rebelled. Dylin led his personal guards to mutiny and killed the family's chief, Zichuan Canxing, and the other important ministers of the family, Stirling, and occupied the imperial capital. Hideyoshi was heartbroken. He raised his army to attack Dylin and had a decisive battle with him in Sandhill City. In the end, Dylin was defeated. However, Dylin was ambushed by Ma Wei on his way overseas and died after being seriously injured. Thus, Shoutu did not directly injure Dylin, but indirectly caused his death through his crusade against him.

In the Naruto series, Sakura was often portrayed as a bit of a damsel in distress early on. Some fans who really like strong, independent female characters might not like her for that. So they write 'naruto hate sakura fanfiction' as a way to vent their frustration with her character development. They may think she didn't grow as much as she could have in terms of being a truly capable ninja on her own, without always relying on the male characters around her.