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 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.
The story could develop with Konoha facing various threats without Naruto's help. They might initially struggle and have to rely on their remaining ninja forces. This could lead to the development of new characters or the growth of existing ones as they are forced to step up. Meanwhile, Naruto could be off on his own journey, perhaps exploring the true nature of the Rinnegan's power or trying to create a new world order without Konoha's influence.
The story would also change the perception of Naruto. Instead of being seen as the hero of Konoha, he would be considered a traitor by many. This would create a whole new set of relationships and conflicts. His friends might try to convince him to change his mind, leading to some very emotional and complex storylines. The shinobi world as a whole might start to question the values that Naruto has always represented, like loyalty and perseverance. And if Konoha does fall, it could inspire other villages to reevaluate their own security measures and relationships with their ninjas.
Perhaps Naruto with the Rinnegan has seen a darker side of Konoha that he was previously unaware of. It could be something related to the village's past secrets, such as hidden experiments or unjust actions towards other ninja clans. This new knowledge makes him so disillusioned that he refuses to offer his help. Also, he might have formed new alliances outside of Konoha that he values more and that conflict with Konoha's interests.
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.
Well, Naruto is known for his strong will and great power. In fanfiction, someone might ask Naruto for help because he has proven himself to be a reliable hero. He has saved the village multiple times, so people trust him to handle various problems, whether it's dealing with a new threat or helping with personal issues.
They're popular because they offer a new and different view of the Naruto world. People are often interested in seeing the other side of Konoha, which is usually presented as a heroic and positive place in the original series. By bashing Konoha in crossovers, it allows for exploration of different moral and ethical concepts.
One possible reason could be fear. Naruto has the Nine - Tails within him, and some in Konoha might be too afraid of its power getting out of control. They may not fully trust Naruto to keep it in check.