One possible reason could be a misunderstanding. Maybe Naruto heard some false rumors about All Might's actions in the hero world that made him form a negative opinion. For example, if there were rumors that All Might was too self - centered in his heroics, Naruto, who values teamwork and selfless acts in his own ninja world, might start to dislike him.
Perhaps in the fanfiction, All Might visits the Naruto universe. Naruto is intrigued by his power and starts to train under him. Together, they face a new threat that combines the dark forces of the Naruto world and some villains from My Hero Academia. The plot could revolve around how they use their combined skills and knowledge to defeat this new enemy.
Well, it depends on your definition of 'good'. There are some 'naruto is all might fanfiction' that are really creative. For example, some might have Naruto learning from All Might's heroics and applying those concepts in the Naruto universe. Others might be more about crossovers where the two characters meet in a strange new world. It's really a matter of exploring different works to find what you like.
Well, one possibility could be that Naruto inherits some of All Might's heroic qualities. Maybe he has an in - built sense of justice like All Might. He could use his ninja skills along with the moral compass he got from All Might to protect his village in new and unique ways. For example, he might be more fearless in the face of danger, and inspire others in the ninja world in a similar way All Might inspired in his own universe.
One challenge could be the over - reliance on his element - controlling ability. He might forget his other skills and strengths. Also, other characters might start to depend too much on him, putting a lot of pressure on Naruto.
Allies could include his usual friends like Sasuke and Sakura. Since Naruto has the connection to All Might, they might see him as an even greater leader and support him more strongly. Kakashi could also be an important ally, guiding Naruto on how to combine his newfound 'All Might - like' qualities with his ninja skills. As for enemies, Orochimaru might be interested in Naruto's new power source and try to steal it for his own evil purposes. The Akatsuki could also view Naruto as a major threat now that he has additional power and try to eliminate him.
All Might, on the other hand, might be confused by Naruto's hatred. This could make him re - evaluate his own actions and how he presents himself. He may try to understand Naruto's world better in order to resolve the conflict. He could also become more cautious in his interactions with others, fearing that his hero image might be misinterpreted.
It could be a rogue ninja from a hidden village. There are always some ninjas who go against their village's rules and become outlaws. They might target Naruto because of his reputation or the power of the Nine - Tails within him.
In the 'izuku stronger than all might fanfiction', Izuku can be stronger for several reasons. Fanfiction writers often take creative liberties. They may write that Izuku has a deeper understanding of his quirk, One For All, compared to All Might. He could also have additional abilities or support from other characters that contribute to his increased strength. Maybe he has formed alliances with powerful individuals who help him train and unlock new levels of power, enabling him to surpass All Might.
His friends like Sakura, who is a medic - ninja, would surely be the first ones to try to help. She could use her medical knowledge and skills to diagnose Naruto's illness.