It could be due to personal experiences. Perhaps he had a bad encounter related to the hunt in the past. For example, he might have lost someone dear during a hunt. So, in the fanfiction, this past trauma makes him hate the hunt.
Maybe Percy has a different set of values. He might be more into peace and stability rather than the chaos and violence often associated with the hunt. In fanfiction, the hunt could be depicted in a way that goes against his moral code.
In fanfic, Percy could hate the gods because of their lack of accountability. For example, when a monster attacks a demigod camp, the gods don't always step in to help. Percy may have to fight and risk his life while the gods seem content to watch from afar. Additionally, the gods' treatment of their own children can be quite cruel in some interpretations. Some demigods are abandoned or given impossible tasks, and Percy might resent the gods for this behavior towards his fellow demigods.
Naruto might dislike fanfiction because it can be a source of misinformation. Fans who read fanfiction might get the wrong idea about him or his world. He wants people to understand his story as it was originally intended. The original Naruto story is a carefully crafted narrative about ninja life, dreams, and the pursuit of peace. Fanfiction can deviate from this and make it seem like something else entirely, which he would find unacceptable.
She may not like the false interpretations of Batman in some fanfictions. Fanwriters might change his personality or motives, and as a fellow hero, she doesn't appreciate that.
Tony Stark may dislike Avengers fanfiction because it can mess with the emotional core of the team. The real relationships between the Avengers are deep and complex. Fanfiction might simplify or distort these relationships. For instance, his friendship with Steve Rogers has many layers, and fanfiction could make it into something that doesn't do justice to their real bond. Also, he's a man who values his privacy to an extent. Fanfiction might delve into his personal life in ways that he doesn't appreciate, making him feel exposed and misrepresented.
It's possible that he hates it because in fanfiction, his friends and he himself might be portrayed in ways that are completely different from who they really are. For example, Hermione might be made into a silly character instead of the intelligent and brave witch she is. This distortion of the people he cares about could be a big factor.
It could also be that in the fanfiction, Percy is given a new power or ability that Annabeth sees as a threat. Or perhaps Percy is made to side with someone Annabeth dislikes, causing her to 'hate' him in that fan - created story. This shows how different plot elements in fanfiction can change the dynamics between characters.
It might be that in the fanfiction, Calypso represents something that Percy has come to dislike. Maybe she is associated with a force or an idea that Percy opposes, like a form of confinement if she tries to keep him on the island in a more extreme way than in the original tales.
In fanfiction, the politics and intrigues within Olympus might be depicted in a way that makes Percy disgusted. The backstabbing and power - hungry nature of some of the Olympians could be too much for him to bear, so he hates Olympus.
Perhaps the fanfiction is set in an alternate universe where something has happened to change Percy's feelings towards Annabeth. For example, if there was a betrayal in the fan - created story that made Percy turn against her.
One reason could be the clash of cultures. Naruto is set in a feudal Japanese - inspired world with its own unique culture, while Aphrodite is from Greek mythology. The two cultures are very different, and combining them in fanfiction might feel jarring and not in line with the essence of Naruto.