One possible reason could be Naruto's independent nature. He has always been someone who forges his own path. In the Naruto series, he doesn't rely on traditional forms of status or hierarchy. So in the fanfiction, he might refuse peerage because he wants to be recognized for his own efforts and not because of a title.
In the fanfiction, Naruto could refuse peerage as he might see it as a form of bondage. He is used to his freedom, both in terms of movement and decision - making. A peerage often comes with rules and expectations. Naruto, being the free - spirited ninja he is, would not want to be restricted by such things. He'd rather be out there exploring, protecting, and making a difference without the constraints of a peerage.
It could also be due to a power struggle. Naruto is extremely powerful and independent. If Rias or other members of the peerage try to control or limit his power in some way, he would not tolerate it. His power is a part of who he is, and he's used to using it freely to protect others. So this could lead to his departure from the peerage.
One possible reason could be that Naruto might feel he doesn't fit in with the members of Team 7. Maybe he has some personal goals that he thinks he can't achieve while being on the team. For example, he might want to focus more on individual training to become stronger in a specific area like mastering a certain jutsu, and he believes being on a team would be a distraction.
One possible reason could be that Naruto is too focused on his ninja duties. He has always been dedicated to protecting the village and his friends, and marriage might seem like a distraction from that. For example, he has to constantly be on guard against new threats and train the next generation of ninjas.
Perhaps Naruto has been pushed too far by the villagers' continuous mistreatment. Even though he has saved them multiple times, they still show hostility or indifference towards him. So, in the fanfiction, he decides not to help Konoha anymore as a form of self - protection and to break free from this one - sided relationship.
One possible reason could be that Naruto feels betrayed by Konoha. Maybe he discovers some dark secrets about the village's leadership or past actions that make him question whether Konoha is truly worth saving. For example, if he finds out that they were involved in unethical experiments or unjust treatment of certain clans. Another reason might be that he has been pushed too far by the villagers' continuous mistrust and discrimination towards him, despite all he has done for them. So he decides he's had enough and refuses to save the village that has not fully accepted him.
One possible reason could be that Naruto has seen the toll the position takes on those who hold it. Maybe he witnessed the stress and loneliness that previous Hokages like his father had to endure. He might want a more carefree life, exploring the world and spending time with his friends and family without the heavy burden of leading the village.
It could also be that the plot of the fanfiction has Naruto in a situation where talking might put him or his loved ones in danger. So, for their safety and his own, he chooses not to talk.
One possible reason could be that Naruto feels betrayed by Konoha. Maybe he discovers some dark secrets about the village that make him question whether it's worth protecting. For example, if he finds out that the village elders were involved in unethical experiments or unjust actions against certain groups. Another reason might be that Naruto has different ideals now. He could believe that there are more important things in the world than just protecting Konoha, like bringing true peace to all nations without focusing on one village's interests.
One possible reason could be that Naruto has some kind of misunderstanding with Kakashi. Maybe he saw Kakashi do something that he misinterpreted, and it made him so angry or disappointed that he refuses to call him sensei.
It could be that Naruto is under some sort of external pressure. Maybe there are other people in the village who don't trust Sasuke and Naruto doesn't want to go against the village's wishes. Or he might be worried about Sasuke using the knowledge he teaches for the wrong purposes. Naruto has always been about protecting the village and he doesn't want to put it at risk by teaching Sasuke if he's not sure of Sasuke's intentions.