One possible reason is the way Naruto's character arc is perceived. Some might think his transformation from an outcast to a hero was too sudden or not well - developed enough. So in the fanfic, they feel he doesn't deserve the large fan base.
Perhaps they believe Naruto got too much attention or development in the original series while their favorite side characters were overlooked. So in their fanfic, they express this feeling that Naruto doesn't deserve all the love from fans.
One possible reason could be that their personalities don't mesh well in the context of the fanfic. Naruto might be portrayed as someone who values different qualities in a partner that Hinata doesn't possess. For example, if the fanfic focuses on Naruto's love for adventure and freedom, he may see Hinata as too reserved and home - bound, which could lead to a lack of romantic feelings.
Naruto could be tired of the expectations placed on him. Everyone has always assumed he would be Hokage since he was a child. He might want to break free from those expectations and define his own path. He may feel that being Hokage is more about fulfilling others' wishes for him rather than his own true desires. So, he decides he doesn't want to be Hokage in this fanfiction.
One possible reason could be that Naruto has been mistreated by the villagers in Konoha for a long time. Despite his efforts to gain acceptance, if he's constantly faced with rejection or unfair treatment, it might lead to him not caring. For example, when he was a child, many villagers shunned him because he was the host of the Nine - Tails. This continuous negative experience could build up over time and cause him to lose his sense of loyalty to Konoha.
One reason could be the purist view. Some fans might be so in love with the original Naruto series that they don't want any fan - made interpretations. They want to preserve the integrity of what Kishimoto created.
One possible reason could be that he has been living a life apart from his family for so long that he feels alienated. He grew up alone in Konoha, with no knowledge of his family for a large part of his life. So, when suddenly faced with this family in the fanfiction, it's hard for him to accept.
It could also be that his siblings continuously rejected him and his ideals in the past. Naruto has always strived for peace and acceptance, and if his siblings constantly opposed him on these fundamental things, it might lead to his unwillingness to forgive.
Maybe it's related to his sense of independence. Naruto is used to relying on himself and having others touch him might make him feel like his personal space and autonomy are being invaded. He's always been on a journey to prove himself, and being touched could be seen as a form of interference in that self - discovery process.
In the Naruto fandom, fanfics about Naruto getting someone pregnant can be a bit controversial in terms of ethics. On one hand, fanfics are a form of creative expression. However, it might go against the general spirit of the original Naruto series which is more about friendship, growth, and ninja adventures. Some fans might find it inappropriate as it could distort the characters' intended personalities.
Maybe they believe Naruto doesn't deserve fanfic because the creator's vision was so strong. Masashi Kishimoto had a clear plan for Naruto and the world he created. Fanfics could deviate from that original vision. For instance, the complex relationships like Naruto's with Sasuke and Sakura were carefully developed, and fanfics might mess that up.