Perhaps Sakura has grown and changed herself. She might have developed new interests and values that are no longer compatible with Sasuke's. In the fanfiction, she could have met new people who showed her a different kind of love and respect, making her question her feelings for Sasuke.
She might be indifferent. Sakura could simply act like Sasuke is just another acquaintance. When she sees him, she doesn't show any special emotions, just a casual nod or a brief greeting.
It could be that Sakura has done something that has disappointed Naruto deeply. This could range from her making a decision in a mission that Naruto didn't agree with, to her not being there for him during a difficult time. These actions might have gradually eroded his love for her.
Maybe in the fanfiction, Vegeta has some personal growth that makes him focus more on himself rather than family. He might have new goals and ambitions that he thinks are more important than his relationship with Trunks.
Perhaps in the 'sakura doesn't care anymore fanfiction', Sakura has been betrayed one too many times. She could have been let down by her friends or mentors. As a result, she withdraws from the world around her and stops caring about the things that used to matter to her, like the outcome of battles or the well - being of the village. This change in her attitude would have a significant impact on the story's dynamics.
One possible reason could be that Sakura has grown and changed a great deal. Maybe she has become stronger both physically and mentally, and this newfound strength and confidence are what draw Sasuke to her. For example, if she has made significant contributions to the village or has mastered some new and powerful jutsu, Sasuke would start to see her in a new light.
Well, in the fanfiction context, Naruto may not love Sakura because he has unrequited feelings for someone else. Maybe he has a deep connection with another character that makes him view Sakura just as a teammate. Also, their personalities might not be as compatible in a romantic sense as one would initially think. Naruto is often impulsive and headstrong, while Sakura can be a bit more reserved in some ways, and this could lead to a lack of romantic attraction.
It could also be because of the fans' personal preferences. They may not like the idea of Sasuke and Sakura being together. So they create fanfictions where Sasuke doesn't love Sakura to satisfy their own vision of how the story could be. They might be fans of other pairings involving Sasuke or just don't think Sakura is a good match for him based on their understanding of the characters' personalities.
One possible reason could be a change in the character's values. Maybe the protagonist has grown to value different things than what Sasuke represents. For example, if the story has a theme of peace and Sasuke's actions are still driven by revenge, the character might feel they can no longer love him.
In some fanfictions, Sasuke could be under the influence of some dark power or curse. This power might compel him to kidnap Sakura. For example, a dark entity might want to use Sakura's abilities or her connection to Sasuke for its own evil purposes, and Sasuke, being unable to fully control himself, follows its commands.
One possible reason could be Sasuke's pursuit of power. In many fanfictions, his thirst for greater strength might lead him to leave Sakura behind as he embarks on a solo journey to train in more dangerous and secluded places. He may feel that his goals are too dangerous for her to be involved with.