In some fanfictions, a curse or a dark magic spell might be involved. This could make Naruto's perception of his wife change completely, causing him to hate her. Also, if there are false accusations against his wife, like being framed for a crime she didn't commit, Naruto might be led to believe she's not the person he thought she was and start to hate her.
One common scenario could be a love triangle gone wrong. If there's another character vying for Naruto's affection and his wife is seen as an obstacle, it might lead to a situation where Naruto starts to dislike her. Another could be if his wife is forced to make a difficult decision that Naruto misinterprets as betrayal, like siding with an enemy to save Naruto in a way he doesn't understand.
Sometimes in fanfiction, power dynamics can play a role. If Naruto's wife gains a great deal of power suddenly and starts making decisions that Naruto doesn't agree with, it could lead to a rift between them. Or perhaps there are secrets from her past that come to light and Naruto feels deceived, which then results in him hating her.
Perhaps in the fanfic, there is a prophecy that says Naruto's friends will be the cause of his downfall. So, Naruto, fearing for his future and the safety of the village, starts to distance himself from them and eventually hates them. Or maybe his friends accidentally cause the death of someone Naruto loves dearly, which makes him unable to forgive them.
One common scenario could be that his family has some sort of dark secret. For example, his father might be involved in something evil that Naruto discovers, leading him to hate his family. Another scenario could be that his family has been neglectful of him. In the fanfic, Naruto might have grown up feeling unloved by his family, which causes his hatred.
Often in these fanfics, Sakura might make fun of Naruto's dreams or goals in a very mean - spirited way. This constant put - down could lead Naruto to hate her. Also, if Sakura were to side with Naruto's enemies in the fanfic for some reason, like being brainwashed or having a hidden agenda, it would be a likely cause for Naruto's hatred.
One possible scenario is if Naruto is constantly blamed for the team's failures. For example, if every mission that goes wrong is pinned on Naruto, even when it's not his fault, he might start to hate the team. This could be due to a misperception by the other members or a malicious plot within the fanfiction world.
One common scenario is when Sasuke betrays the village. Sakura, who is loyal to the village, may then feel hatred towards him. She has grown up in the village and values its safety and well - being, so Sasuke's betrayal would be a major blow to her and could turn her love into hate.
In some fanfictions, Ron might be under the influence of a spell or some dark magic that changes his behavior. If he starts acting in a way that is harmful or annoying to Hermione, like constantly arguing with her or trying to undermine her work, she could end up hating him. Also, if there's a competition in the fanfic, say for a powerful magical item or a high - ranking position in the wizarding world, and Ron tries to cheat Hermione out of it, that would likely make her hate him.
A scenario could be that Sasuke blames Sakura for something that went wrong in his revenge plan. Maybe she unknowingly did something that set him back, and in his anger and single - minded focus on revenge, he starts to hate her. Another possibility is that in the fanfic world, there is a misunderstanding. Sakura is misinterpreted as being involved with someone who has wronged Sasuke, and this causes him to hate her without really knowing the truth.
A very common scenario is at mealtimes. Naruto might save a seat for Hinata or share his favorite food with her. Also, when Hinata is injured, Naruto will stay by her bedside, showing extreme worry. And sometimes, Naruto will find himself getting jealous if other guys are getting too close to Hinata, which is a clear sign of his crush in the fanfiction world.
One common scenario is that Harry leaves Britain and goes to live in another wizarding community. He might feel that he can start anew away from the pain and memories of Britain.
Another scenario could be that Bella does something that endangers Jacob's family or the werewolf pack. This would make Jacob see her as a liability and develop hatred towards her. In some fanfictions, she might accidentally expose the werewolves to their enemies because of her association with the vampires.