Maybe he has some personal grudges against the village. For example, he might have felt betrayed by the village in the past and that made him reluctant to offer help.
The village would likely be in a state of panic. Since Naruto is very powerful, without his help, they might be vulnerable to attacks. They would have to find other ways to defend themselves, which could be difficult.
Maybe in the fanfiction, Naruto has discovered a new family or group of friends outside the village who are in need of his help more urgently. He has to prioritize them over the village that banished him. He could also be trying to teach the village a lesson about the consequences of their actions by refusing to help.
Maybe he has some personal grudges or misunderstandings within the family in the fanfiction. It could be that something happened in the past that made him feel betrayed or unappreciated, so he refuses to offer help.
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.
The story could progress with Konoha facing a great threat without Naruto's help. The village might initially struggle to find a replacement for Naruto's power. This could lead to a sense of panic among the villagers and the leadership. Some might start to regret their past actions towards Naruto.
Perhaps Naruto has found a new purpose or community outside of Konoha that values him more. He may be so content with his new life that he simply doesn't want to get involved with Konoha's problems anymore. Konoha's actions towards him could have made him realize that his loyalty was misplaced all along.
Well, it completely flips the idea that Naruto is always loyal to Konoha. In the original story, Naruto's main goal was to protect the village. Here, his refusal makes Konoha vulnerable and forces the other characters to re - evaluate their relationship with Naruto and also their own role in protecting the village.
It could also lead to new alliances. Other villages might see Naruto's stance and try to form alliances with him, seeing an opportunity to weaken Konoha. This would then put Konoha in a more precarious position and force them to reevaluate their relationships with other villages.