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 for Naruto's safety. Maybe she has to go on a dangerous mission and believes Konoha is the safest place for him. Another reason might be that she is forced by some powerful enemies who threaten Naruto's life if she doesn't leave him in Konoha.
In this fanfiction, perhaps Naruto leaves Konoha because he's being framed for something he didn't do. As he flees, he encounters Temari. Temari, being a strong - willed character, might be intrigued by Naruto's situation. She decides to help him clear his name. During this process, they travel to different places, learn about each other's pasts and dreams, and their relationship evolves from distrust to mutual respect and then to a deeper connection.
One possible plot could be that Naruto leaves Konoha due to some misunderstanding. Maybe he feels unappreciated in his relationship with Sakura (Narusaku). He might go on a journey to find himself. Along the way, he could encounter new enemies and also make new friends who help him see things from a different perspective.
Well, perhaps Naruto is neglected in Konoha because of his past or the way he behaves. He leaves and stumbles upon a hidden village that has different values. There, he is welcomed and trained further. As he grows stronger, Konoha realizes their mistake. Naruto has to decide whether to forgive Konoha and return or stay in his new - found home where he is respected.
Perhaps Naruto leaves because he wants his child to grow up away from the pressures and expectations that come with being in Konoha. He might feel that the outside world can offer a more peaceful and normal upbringing for his family.
In this kind of fanfic, one possible scenario could be that Naruto leaves Konoha due to feeling misunderstood. Maybe he has been wrongly accused of something and decides that he can't stay in a place where people don't trust him.
This type of fanfiction concept is really out of the ordinary. Naruto's character is built on his values of friendship, loyalty, and his dream of becoming Hokage. Killing Sasuke would mean betraying all of that. However, in a fanfiction, the author might be exploring the 'what - if' scenario. For example, what if Sasuke's actions against Konoha were so heinous that Naruto felt he had no choice? But still, it's a far - fetched and very different view from the original Naruto we know.
The relationship between Konoha and the Uzumaki clan might be further strained. With Kushina leaving, Konoha would lose an important link to the Uzumaki. And other Uzumaki members might see this as a sign that Konoha is not a safe place for them.
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.