One possible reason could be a clash of personalities. Naruto is from a world with its own set of values and power systems, and Sirzechs is from a different fictional universe. Maybe Naruto, in the context of the fanfiction, sees Sirzechs' power or attitude as something he dislikes. For example, if Sirzechs has a very different view on leadership compared to Naruto's idea of it, that could cause friction.
Perhaps in the fanfiction, there is some sort of misunderstanding between them. Naruto might misinterpret Sirzechs' intentions. Maybe Sirzechs is doing something for a good reason but Naruto doesn't see it that way. Like if Sirzechs is trying to gather power to stop an even greater evil, but Naruto thinks he's just being power - hungry.
One possible reason could be that the original Naruto story has a very distinct and carefully crafted world and character arcs. Fanfiction might distort these in ways that seem disrespectful to the source material, making Naruto, as a character concept, seem to 'hate' it. For example, some fanfictions may change Naruto's core values or relationships in a way that goes against the essence of the character.
Well, in the 'naruto hates zeus fanfiction', it could be due to cultural differences. Naruto's world has a specific Japanese - inspired culture, while Zeus is from Greek mythology. Naruto might resent Zeus for representing a foreign and perhaps overpowering entity that doesn't fit into his understanding of the world.
Well, maybe in this fanfiction Naruto has some clashing values with Makarov. Naruto values loyalty and friendship highly, if Makarov somehow goes against these concepts in the fanfic, Naruto could hate him.
Maybe Naruto feels overshadowed by the Rookie 9 in the fanfiction. In the original series, Naruto has his own journey and development. If the fanfiction misrepresents his relationship with the Rookie 9 in a negative way, like making them seem better than him all the time, he could hate it.
One reason could be that the fangirls in the fanfiction might misinterpret his character. Naruto is a complex character with his own goals and values, and fangirls might focus too much on romanticizing him rather than staying true to his essence.
One reason could be a misinterpretation of their complex relationship. In the original story, Naruto actually cares deeply for Sasuke. But in fanfiction, the author might be exploring a 'what if' scenario where Naruto's frustration turns to hate due to Sasuke's repeated betrayals. Another reason could be to create a more angsty or dramatic plot. By having Naruto hate Sasuke, it can introduce new conflicts and character developments that are different from the canon.
It could be that the fanfiction simply doesn't meet Boruto's standards for what the Naruto universe should be like. He has grown up in that world and has his own ideas about how things should be. Fanfiction can be very hit - or - miss in terms of quality and faithfulness to the source material. If it's of poor quality or changes things too much, Boruto might hate it.
One reason could be that it goes against the core themes of Naruto's character development. Naruto was always longing for family and his journey was about finding his place in the world which included his family roots. Fanfiction that has him hating family might seem out of character.
Maybe the fanfiction portrays Hinata in a way that doesn't align with her true character. For example, it might make her overly aggressive or weak in a way that doesn't fit the original concept.
One reason could be that Naruto values respect, especially towards women. Perverts in fanfiction might go against this value of his. He has been shown to be protective of his friends, and seeing improper behavior towards them or others in fanfiction would make him dislike it.