Perhaps Naruto is being influenced by an outside force. It could be an enemy who has tricked him into believing that his team is holding him back. Or it could be that he has fallen into a dark state of mind, like if he has some kind of mental breakdown due to all the pressure he has faced in the past. In this state, he might just push Team 7 away without really meaning to in the long run.
The plot might involve Naruto being influenced by some external force. For example, a new enemy could be using some kind of mind - control or illusion on him to make him ignore the Rookie 9. Another possibility is that Naruto has become so focused on his training to become stronger that he starts to neglect his relationships with the Rookie 9, thinking that his power is more important for the future of the village.
It could be Orochimaru. He's always been interested in Naruto and might come up with a plan to drive a wedge between Naruto and the Rookie 9. By making Naruto ignore them, he could be trying to isolate Naruto and make him more vulnerable to his attacks or manipulations.
Often in fanfiction, Naruto ignores his family when he becomes obsessed with power. He may think that the power he gains is more important than his family ties. For example, if he discovers a new form of chakra or a new jutsu, he might seclude himself to master it, ignoring his family's concerns. This can lead to his family feeling neglected and trying to bring him back to his senses.
Maybe he got some kind of curse. In the Naruto universe, there are all sorts of dark magic and curses. If he was cursed, it could make him withdrawn and cause him to ignore everyone.
In some Naruto fanfictions, Hinata could potentially be portrayed as a 'weapon' in a very metaphorical sense. For example, her Byakugan abilities might be exploited in unique ways that make her seem like a strategic weapon for a side or a cause. But in the canon Naruto story, she is a character with her own agency and not really a weapon.
One great source for Naruto and Hinata fanfiction could be FanFiction.net. You can search for stories specifically focused on their relationship there. There are often new and interesting takes on their story, from how they first fell in love to their married life in the future.
Perhaps in the fanfiction, Hinata wears a micro bikini for a special festival in the Hidden Leaf Village. Naruto is really excited to see her in it. They participate in the festival games together and Hinata's new look makes Naruto see her in a different light, more as a strong and confident woman.
One possible plotline could be a story where Naruto has to choose between two versions of Hinata, the original Hinata and a version from an alternate RTN (Road to Ninja) universe. Maybe in this fanfiction, the different Hinatas have unique abilities or personalities that make Naruto's choice more difficult.
In many Naruto x Hinata Hyuga fanfictions, their relationship is often explored in greater depth. Usually, it emphasizes Hinata's long - standing admiration for Naruto. Her shy yet determined love for him is a central theme. Writers might show how Naruto gradually realizes Hinata's true feelings and how their relationship evolves from friends to something more romantic.