It could also be due to a misunderstanding. Kakashi might be keeping some secrets from Naruto, like information about his parents or some hidden power within him. Naruto, being curious and eager for answers, could misinterpret Kakashi's motives for secrecy as a sign of distrust or dislike, which then turns into hatred.
One possible reason could be that Naruto might feel Kakashi is too strict with his training. Maybe Kakashi's methods are too harsh for Naruto, making him frustrated and gradually developing dislike.
Communication is key. If they sit down and talk about their misunderstandings and feelings, it could start to mend their relationship. Naruto could express his frustrations, and Kakashi could explain his actions.
One possible reason could be that in the fanfiction, Kakashi might have made a decision during a mission that Naruto strongly disagreed with. For example, Kakashi could have chosen to sacrifice something important to Naruto in order to achieve the overall mission objective.
Well, if Naruto hates Kakashi, it could affect his relationship with Sasuke. Since Kakashi trained both of them, Naruto might start to resent Sasuke for still having a good relationship with Kakashi. This could create more tension between Naruto and Sasuke, adding another layer to their already complex dynamic.
Well, one similarity could be their determination. In the fanfic, like in the original series, both Naruto and Kakashi are very determined. Naruto is always striving to become Hokage and Kakashi has his own goals and missions he's dedicated to. They also might share similar combat styles in the fanfic, perhaps Naruto starts to adopt some of Kakashi's strategic thinking during battles.
The 'naruto hates kakashi and sakura fanfiction' completely flips the story dynamic. The original story is built on friendship and teamwork. Here, with Naruto's hatred, that foundation is shattered. It could lead to different power structures in the ninja world. Maybe Naruto teams up with other characters against Kakashi and Sakura. It also affects the emotional tone of the story, from one of hope and camaraderie to one of conflict and animosity.
Perhaps in this fanfiction's universe, Naruto's goals and ideals are completely different from Kakashi and Sakura's. Naruto may be aiming for a more radical change in the ninja world, while Kakashi and Sakura are more conservative. Their differences could lead to Naruto developing a sense of hatred towards them as they constantly oppose his ideas.
One funny fanfic could be about Kakashi trying to teach Naruto some new jutsu, but Naruto keeps getting distracted by the local wildlife. For example, he spots a bunny and chases after it, leaving Kakashi exasperated.