It could be related to the Nine - Tails. Maybe there was a new threat related to the Nine - Tails sealed within Naruto, and instead of trying to help him control it or find a solution, the village decided to banish him out of fear. His hatred would then stem from the fact that his own home turned its back on him when he needed support the most.
Perhaps some powerful and corrupt individuals in Konoha, fearing Naruto's growing power and influence, framed him for something. This betrayal could turn his love for the village into hatred. His banishment could be part of their plan to get rid of him. They might have spread false rumors about him endangering the village, which made the rest of the villagers turn against him.
One possible reason could be that the villagers never fully accepted him despite his efforts to protect Konoha. They might have continued to treat him as an outcast, which could have led to his growing resentment and ultimately his banishment if the situation got out of hand. For example, if he was wrongly accused of a serious crime and instead of getting a fair trial, the village elders decided to banish him.
Perhaps Naruto discovers some dark secrets about Konoha that go against his values. Like if the village has been involved in unethical practices that he can't overlook. This could be things like using underhanded tactics against other villages, which would make Naruto, with his strong sense of justice, turn against Konoha.
Perhaps he discovered some dark secrets about Konoha that made him lose faith in the village. For example, if he found out that the village leaders were involved in unethical or immoral activities that were against his values, it could make him hate Konoha. He might also feel betrayed if his so - called friends turned their backs on him for some reason.
One possible reason could be a sense of betrayal. Maybe he felt abandoned or mistreated by Konoha in some way. For example, if he was shunned because of the power within him that others feared.
Another reason could be that he witnesses corruption or unfairness within the village leadership. If he sees that the system is rigged against certain groups, including himself or his friends, he could grow to hate Konoha and decide to leave.
One possible reason could be a misunderstanding within the family. Maybe there were secrets kept from him that made him feel betrayed. As for Konoha, perhaps he felt ostracized or not fully accepted by the village despite his efforts, which led to his hatred.
It could also be related to the way Konoha has dealt with other issues like the Uchiha clan massacre. If Naruto discovers some aspects of Konoha's involvement in it that he finds morally unacceptable, such as covering up the truth or being complicit in some way. This could make him lose faith in Konoha and be unable to forgive it.
One possible reason could be that it goes against the original essence of Naruto's relationship with Konoha. Naruto has a strong bond with Konoha, and yaoi fanfiction might distort that relationship in a way he wouldn't like. Another reason could be that Naruto is a character who values traditional values and friendship in a non - sexualized way, and yaoi fanfiction often sexualizes male - male relationships which he may find inappropriate.
One possible reason could be that Konoha has made decisions without considering Naruto's opinions. Maybe they have made policies that Naruto believes are unjust towards certain groups, like the treatment of the Uchiha clan in the past. Naruto, who values fairness and friendship, would be angry at such insensitivity from his village.
Perhaps she discovers some dark secrets about Konoha's past. Things like the way the village treated certain clans or individuals unfairly. If she uncovers that Konoha was involved in some unethical actions in the past, it could make her lose faith in and start to hate the village. Also, if her loved ones were wrongly treated or sacrificed by Konoha's decisions, that would be a strong reason.
One possible reason could be the lack of presence of his parents. Growing up without them, he might feel abandoned. And as for Konoha, if he hates it, it could be due to the way he was treated as an outcast, despite being the son of important figures. Maybe the villagers' coldness towards him made him resent the village that didn't seem to protect him from that.