It could be that the crossovers in Fairy Tail fanfic often misinterpret Naruto's character. Writers might not capture his essence accurately, making him act out of character in the context of a Fairy Tail - Naruto mash - up. This could lead to Naruto, as a character concept, seeming to 'hate' these fanfics as they don't do justice to who he is.
Maybe Naruto hates Fairy Tail fanfic because the two universes have very different themes and power systems. Naruto's world is more about ninja skills, clan politics, and personal growth within a set ninja framework. Fairy Tail is about magic guilds and more flamboyant magic use. The clash of these different concepts in a fanfic might be unappealing to Naruto fans who prefer the purity of the Naruto universe.
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.
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.
The ninjas from Naruto are used to a more disciplined and hierarchical structure in their village. In contrast, the Fairy Tail members are more free - spirited. So, when Naruto meets the Fairy Tail guild, there could be some initial clashes. For example, Naruto might be confused by Natsu's impulsive and hot - headed nature. When it comes to Aquarius, Naruto could be respectful of her power as a spirit. He might try to learn from her about water - based abilities, while Aquarius could be intrigued by Naruto's chakra control.
On the positive side, it could inspire some fans to try and bridge the gap. There might be some fans who see this divide and try to find common ground between Naruto and Fairy Tail. They could create fan works that combine elements of both in a positive way to try and change the negative perception.
First, you need to understand the universes of Naruto, Irene's character from Fairy Tail, and the general world of Fairy Tail. Research their powers, the cultures in those worlds. Then, come up with an interesting plot. It could be a crossover adventure where Naruto and characters from Fairy Tail have to face a common enemy. For example, a new villain that threatens both the ninja world and the magical world of Fairy Tail. Irene could be a key character in this, either as a helper or a more complex figure with her own motives.
When writing such a fanfic, start with a strong plot. For example, you could base it on a conflict. Say, an evil force is trying to take over both the Naruto and Fairy Tail worlds, and only by combining the powers of the Rinnegan and Fairy Tail magic can it be stopped. As for the writing style, use vivid descriptions to bring the battles and magic to life. Also, don't be afraid to introduce new characters that are a blend of the two universes, like a ninja - mage hybrid.
A fanfic could focus on a new character who has the powers of Naruto's chakra system and is also related to the Strauss family in the Fairy Tail world. This character could go on adventures in both the Naruto and Fairy Tail universes, facing challenges like the Akatsuki in Naruto and dark guilds in Fairy Tail. They might use Naruto - style combat techniques along with Fairy Tail magic.
I really like 'Erza's New Journey in Naruto'. In this fanfic, Erza somehow gets transported to the Naruto world. The story shows how she adapts to the new environment, with all the ninjutsu and different cultures. It's fascinating to see her interact with Naruto and his friends. Also, 'Fusion of Powers' is a good read. It's about a scenario where the powers of Naruto characters and Erza's magic start to blend, creating some unexpected and exciting situations.
One good weak Naruto in Fairy Tail fanfic could be 'Naruto's New Adventure in Fairy Tail'. In this fic, Naruto starts off as a rather weak character in the Fairy Tail world, having to relearn how to use his skills. It has some interesting character interactions, like when he meets Natsu and they have a friendly spar that shows Naruto's initial struggle.
Well, if Naruto was in the S - Class of Fairy Tail, his combat skills would be a great addition. Naruto's ability to use shadow clones could be used for various strategic purposes during Fairy Tail's missions. He could send clones to scout ahead or create distractions in battles against dark guilds.