Maybe he thinks fanfic often distorts the real story or characters of Naruto. In the original Naruto series, Kakashi has his own understanding and relationship with Naruto. Fanfic might create some scenarios that go against his view of Naruto or the world they live in.
One reason could be that fanfic can sometimes spread false or untrue ideas about Naruto, which he cares about. Since he has a deep connection with Naruto in the original story, seeing fanfic that misrepresents Naruto or their relationship might make him not like it. And some fanfic may not capture the essence of their bond accurately, which could be a turn - off for him.
Well, it could be that he dislikes the way some fanfic writers portray him in relation to Naruto. In fanfic, they might make him act out of character. He's a character with a set personality in the official story, and when fanfic changes that, it can be off - putting. Also, some fanfic might over - exaggerate the relationship between him and Naruto in ways he wouldn't approve of.
Well, it could be that Kakashi, being a character who values the integrity of the original Naruto narrative, sees fanfiction as a deviation. Fanfiction might include out - of - character scenarios for him or the other characters. He might also dislike the fact that some fanfictions can be of very poor quality in terms of writing and plot, which could be a reason for his dislike.
In the fanfic, Naruto could hate Team 7 because of a change in the story's plot. Perhaps something bad happened that he blames on the team. It might be that the team made a decision that Naruto strongly disagreed with, like a mission choice or how they treated an enemy. This could cause his feelings towards them to turn sour.
Well, in fanfics, sometimes authors like to take a completely different approach to characters' relationships. In the case of Naruto hating Kushina, it could be related to a power struggle within the fanfic's plot. Maybe Kushina has some power that Naruto feels threatened by, or there are political or family reasons within the made - up world of the fanfic that cause this animosity. It's all about exploring new and unexpected ideas in the world of fanfiction.
In some fanfics, Naruto might hate Tsunade due to her decisions regarding the village. For example, if she makes choices that Naruto believes put the younger generation at risk or if she is too strict with the shinobi training policies. Naruto, being someone who values his friends and the future of the village, could grow to dislike her.
Maybe in the fanfic, Kurenai has some actions that conflict with Naruto's beliefs. For example, she might oppose Naruto's way of handling certain village matters.
Maybe he just doesn't like the way some fanfirls act in the fanfic. They might be too obsessive or change his character in ways he wouldn't like.
In some fanfics, Naruto might be made to hate the village because of how he was treated as a child. He was ostracized and shunned by many villagers due to the Nine - Tails sealed within him. This constant rejection could build up resentment over time in a fanfic - based scenario.
In some fanfics, Naruto might seem to 'hate' family due to various reasons. Maybe the author wants to explore a different side of his character. For example, if the fanfic has a plot where his family has wronged him in some way, like his father not being there for him during his difficult childhood. However, this is not the typical view of Naruto in the original series, where family is something he longs for.
In some fanfics, Naruto might be made to hate Kami due to a misinterpretation of Kami's role. Maybe the author wants to create a new narrative where Naruto rebels against the traditional concept of Kami in the Naruto universe.
Another reason could be related to his origin. In fanfic, if his Uzumaki heritage is explored in a way that makes him feel like a burden or an outcast more than in the original series. Maybe there are secrets about his family that make him question his own worth. For instance, if there are made - up prophecies or family curses in the fanfic that make him think he's doomed to bring misfortune, he could end up hating himself.