Well, it could be about Naruto feeling extremely lonely and betrayed. Maybe his team mates left him for some false accusations or because they were influenced by outside forces. He might then struggle to find his place again, both within the ninja world and in his own heart.
In such a fanfiction, perhaps Naruto could become bitter at first. He might feel extremely lonely and start to question his self - worth. This could lead him to go on a journey of self - discovery alone, away from the Hidden Leaf Village that he once called home.
In such a fanfiction, Naruto might become a rogue ninja. He could be filled with anger and resentment towards his former team. Maybe he'd seek power elsewhere, perhaps from villains who would take advantage of his vulnerable state.
One possible plot could be that Naruto is forced to leave Team 7 due to false accusations against him. Sasuke might then go on a solo mission to prove Naruto's innocence. Sakura, feeling guilty for not standing up for Naruto, decides to train harder to be able to bring Naruto back. And Kakashi, caught between the village's decision and his loyalty to Naruto, tries to find a way to reverse the situation.
In such a fanfic, Naruto might become extremely lonely and start to doubt his self - worth even more. He could potentially go on a journey of self - discovery alone, away from the village that has shown him so little love through the actions of his team. Maybe he would find new allies who truly understand him and help him grow stronger not just in terms of power but also in terms of his emotional stability.
One reason could be that his team discovers some kind of hidden power in Naruto that they fear. Maybe they think he's too dangerous to be around, so they abandon him. Another possibility is that they are influenced by some outside force, like an enemy who convinces them that Naruto is a liability.
Perhaps the main antagonist is actually an old enemy who manipulates Naruto's team into abandoning him. This enemy could be using mind - control or false information to drive a wedge between Naruto and his team. They do this to weaken Naruto, knowing that his strength comes from his relationships.
It could be Danzo. He's always been a bit of a shadowy figure in the Naruto series. Maybe he sees Naruto as a threat to his power and influence in the village and manipulates the situation so that Team 7 has to abandon him. He would be a great main antagonist as he has the resources and the motives to cause such a rift in Team 7.
At the start, Naruto would be deeply hurt and confused. His abandonment by Team 7 would be a major blow to his self - confidence. However, this could also be the catalyst for his growth. He would start to look inward and discover hidden strengths within himself. He might become more empathetic towards others who have been rejected or alone. His view of the ninja world would change, and he could become more of a lone wolf type of ninja. He would no longer rely on the teamwork that he once cherished, but instead find his own way to be strong. This new - found independence could lead him to make decisions that are more in line with his own beliefs rather than following the group.