It might develop it through a series of flashbacks. The fanfic could show the events leading up to Sasuke's mistake and Sakura's initial reactions. For example, it could start with a scene where Sakura is shocked by what Sasuke has done, and then through flashbacks, we see the build - up of her feelings.
Well, one possible reason could be that Sasuke's mistake might have put their team in great danger. For example, if his actions led to the enemy getting an upper hand during a battle, endangering not only his life but also those of his comrades like Sakura. Sakura, who values the safety of the team, would then resent Sasuke for his mistake.
The relationship would become very tense. Naruto would likely avoid Sakura and Sasuke. There would be no more of the friendly banter or the complex emotional triangle that was there before. It's a complete shift from their normal relationships in the original story.
Often, it starts with the establishment of their dislike. Then, there could be a series of confrontations. For instance, they might argue or compete in some way, like in a ninja mission where they constantly try to outdo each other.
The fanfiction could develop this hatred through the introduction of new characters. These characters might feed Naruto false information about Minato and Kushina, making him question their motives and ultimately hate them. For example, a character who has a grudge against the Uzumaki family could manipulate Naruto.
The plot could develop as Naruto tries to expose Ozpin's secrets. He might gather evidence against Ozpin and try to convince the RWBY characters of Ozpin's wrongdoings. This would create a lot of tension and conflict within the story.
The original story focuses on Naruto and Sasuke's relationship as well as Sakura's love for Sasuke as a driving force for her growth. But the fanfic where Sakura hates Sasuke takes a different turn, it might focus on different aspects of Sakura's character, like her independence and self - realization without the influence of her love for Sasuke.
At first, Sasuke might start with small gestures. For instance, he could be more attentive to Sakura's presence, like looking at her more often or listening more closely when she speaks. This could gradually lead to more direct interactions, such as him starting conversations with her instead of the other way around.
A prevalent theme in 'sakura sasuke mistake' fanfic is miscommunication. Since they both have strong personalities and different goals at times, misinterpreting each other's intentions is quite common. Another theme is the consequences of Sasuke's actions. His decisions often have a huge impact on Sakura, and fanfics explore how these actions are seen as mistakes and how they affect their relationship in the long run. It can be really engaging to read how the authors navigate through these complex themes.
It can create a lot of tension. For example, it might lead to some intense confrontations between them. Their interactions would no longer be friendly or loving but full of anger and resentment.
Maybe in the fanfic, Sasuke has done something to betray Sakura's trust. For example, he might have left the village again without considering her feelings.