One possible reason is the difference in power systems. Naruto has its chakra - based ninja abilities, while Fairy Tail has magic. Combining them in fanfiction might seem forced and not make logical sense to fans of Naruto.
Perhaps the Naruto fanbase has a strong sense of loyalty to their own series. They see Fairy Tail as a completely different entity, and any attempt to merge them in fanfiction is seen as a violation of Naruto's essence. Naruto's story is centered around specific clans, villages, and a long - standing ninja history. Fairy Tail's elements might disrupt this carefully crafted Naruto world in fanfiction, thus leading to dislike.
One reason could be that the fanfictions don't match his view of the Fairy Tail world. He has his own understanding of the guild, his friends, and their adventures, and when fanfictions deviate from that, he doesn't like it.
Maybe it's because they come from different fictional universes with very different values. Naruto is from a world of ninjas where loyalty to the village and personal growth through hard training are emphasized. Erza is from Fairy Tail with a more guild - centered and magic - based world. Their different outlooks and ways of doing things might clash in the fanfiction, leading to Naruto's hatred.
Maybe there is a misunderstanding. Since it's a crossover fanfiction, communication between the two different worlds' characters might be difficult. So, Naruto could be misjudged and betrayed because of false assumptions.
Perhaps the art styles play a role. Naruto has a distinct art style that some people are really drawn to, and when they look at Fairy Tail, they just don't like the visual aspect as much. Also, the story themes in Naruto are often darker and more about political intrigue and personal sacrifice, while Fairy Tail is more about friendship and adventure. Fans of Naruto's darker themes might not like Fairy Tail's more upbeat nature.
It could be that the characters in Naruto have a distinct personality and world - view that don't mesh well with the Fairy Tail universe in fanfiction. For example, Naruto's values of hard work and friendship in his own ninja world are different from how they might be portrayed when forced into the Fairy Tail setting. Fans who are loyal to Naruto's original concept might hate seeing it distorted in Fairy Tail fanfiction.
Mostly, it's hard to find solid evidence. It could be just a vocal minority within the 'Fairy Tail' fandom who feel this way. There's no official statement from the creators of 'Fairy Tail' or any large - scale surveys showing that the entire 'Fairy Tail' fan base hates 'Naruto' fanfiction. It could also be that this statement is an over - generalization of some sporadic negative reactions.
The power scaling might be another issue. Naruto has a very detailed and complex power system that is based on chakra, jutsu, and ninja ranks. Fairy Tail has its own magic - based power system. In fanfics, getting these power systems to mesh well can be difficult, and Naruto might 'hate' being part of a poorly - balanced power - system fanfic.
Well, it could mean that the 'Fairy Tail' fandom has some sort of dislike for 'Naruto' fan - made stories. Maybe it's because of differences in the story styles, themes, or the fan cultures of the two series. For example, 'Fairy Tail' has its own unique magic - based world and set of characters, and fans might feel that 'Naruto' fanfiction somehow doesn't mesh well with their perception of the 'Fairy Tail' universe.
Well, it could be due to a clash of values. Naruto has his own ninja code and beliefs from his world. The Olympians might have different ideals like competition for glory which Naruto may see as self - centered compared to his more community - based ninja values.
There could also be political reasons. Some factions within Konoha might have seen Naruto as a tool or a threat to their own political power. His influence and popularity could have disrupted the existing power balance, leading to animosity from those who wanted to maintain the status quo.