It's possible that yoh is a purist when it comes to the portrayal of humans. Yoh might believe that the original works that feature humans are the only valid interpretations, and fanfiction is just a cheap imitation. Fanfiction may also change the power dynamics or the overall narrative arc in a way that yoh doesn't approve of. For instance, if a fanfiction changes the moral compass of a beloved character just for the sake of a plot twist, yoh would likely be against it. Also, yoh could be put off by the excessive focus on certain aspects like romance in human fanfiction when there are so many other aspects of human nature that could be explored.
One possible reason is that yoh might find the creativity in human fanfiction to be unoriginal. A lot of fanfiction tends to follow similar patterns or tropes, and yoh could be tired of seeing the same old ideas recycled over and over again.
Well, perhaps yoh has had some bad experiences with human fanfiction in the past. Maybe yoh read some really poor - quality ones that were full of clichés or had terrible writing. Or it could be that yoh simply prefers other forms of literature or storytelling over human fanfiction. There are so many different types of creative works out there, and yoh might just be more drawn to non - fanfiction works that deal with humans in a more 'original' way, like classic novels or biographies.
One reason could be that some fans are very purist about the original Naruto story. They might feel that fanfiction often distorts the characters or the plot in ways that go against the essence of what Naruto is all about. For example, changing a character's personality completely to fit a romantic or dark and edgy narrative that doesn't align with the source material.
He might dislike it because it can create false expectations. Fans read fanfiction and might start expecting the real Avengers to act in a certain way that is not in line with their true nature.
Another possibility is that he doesn't like how some fanfictions over - sexualize the characters. In some cases, fanfiction can turn into something inappropriate, and Harry, who has a more pure view of his friends and the wizarding world in general, would be disgusted by this. He wants to preserve the integrity of the relationships and the world as he knows it.
One reason could be the inaccurate characterizations. Fanfiction writers might not fully understand the nuances of Nightwing or Batman's personalities, and Nightwing hates seeing a wrong version of them. For instance, if Batman is made too soft or too harsh in a way that doesn't match the established canon.
The different power scales. Naruto has his own progression of power through training and ninja ranks. Superman's power is on a completely different level like being able to move planets. In fanfiction, it might be hard to balance their powers in a way that makes sense to Naruto fans, so Naruto might seem to 'hate' it.
Perhaps in fanfiction, Boruto is associated with a group or ideology that Naruto opposes. This could cause Naruto to view Boruto unfavorably. Also, if there are false rumors or misinformation spread in the fanfiction world about Boruto, Naruto might believe them and start to hate Boruto until the truth is revealed. And sometimes, it's just a way for the writer to make an interesting and unexpected plot twist.
It might be due to cultural differences. Hermione comes from the wizarding world, and Annabeth from the demigod world. In fanfiction, these differences could be exaggerated, and Hermione might find Annabeth's 'alien' culture off - putting or difficult to understand, leading to dislike.
One reason could be jealousy. If in the fanfiction Snape is getting more attention or praise from the wizarding world than Lily, she might start to dislike him. Another reason could be that Snape has a different view on blood purity, and Lily strongly disagrees with him, which leads to her hatred.
Jason might hate Percy fanfiction because it often creates scenarios that he finds unrealistic or untrue to the original story. For instance, if the fanfiction pairs Percy with characters in a way that doesn't make sense in the context of the original series, Jason would likely be put off. Another factor could be that the fanfiction might over - sexualize Percy or other characters, which is something Jason would not approve of if he values the integrity of the original characters.