It could be for the sake of his loved ones. He might believe that by fleeing the gods, he can draw their attention away from his friends and family, thus protecting them from the gods' meddling or potential vengeance.
His motivation could be freedom. He may feel restricted by the gods' rules and demands, so he decides to flee to gain his own freedom.
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.
Maybe the writer just wants to be different. Since Naruto is usually seen as a hero, they might think it's edgy to write him as a loser.
Maybe for shock value. Some people want to create something that stands out and goes against the norm, so they take a well - loved character like Naruto and give him a completely opposite and dark role.
Perhaps in the 'Percy Kills the Gods' fanfic, there is a new and extremely powerful enemy that the gods are unable or unwilling to fight effectively. Percy sees this as a sign of their incompetence or callousness. He could gain some new, super - powerful abilities or weapons that give him the confidence to challenge the gods. He might start by targeting the more tyrannical gods first, like Zeus, who has a history of being harsh and unfair.
One reason could be that he's tired of being used by the gods. In many of his previous adventures, Percy has been sent on dangerous quests for the gods' purposes. He might feel that they take advantage of his skills and loyalty. For example, he was constantly in life - threatening situations just to retrieve some item or solve a problem for the Olympians. Another reason could be a personal grudge. Maybe a god has wronged him or someone he cares about in the fanfic, and he decides he's not going to play their games anymore.
One possibility is that the gods see Percy and Jason as threats to their power. Maybe they've become too powerful or popular among the demigods. So, the gods plot against them in secret. They could set up a series of seemingly impossible challenges that are actually traps. Eventually, Percy and Jason fall into these traps and are killed. This could lead to chaos among the demigods as they lose two of their most powerful leaders.
Well, it could be that Percy has had enough of the gods' constant interference in his life. He's always been their pawn in some way, and now he decides to run. He might go into hiding in the mortal world, using his skills to blend in. Along the way, he could meet other demigods who also feel the same way about the gods and together they form a sort of resistance, trying to make the gods see how their actions are affecting the demigods.
Well, it could be due to a misunderstanding. Maybe Percy thought Annabeth did something wrong regarding a quest, like made a decision without consulting him. In fanfics, authors often play with such relationship dynamics.
Well, one possibility is that the gods who betray Percy might be jealous of his power or popularity among mortals. Maybe they feel threatened by his ability to influence the mortal world in a way they can't control. They could start spreading false rumors about him, turning some of his allies against him.
The abuser could face immediate death. Gods like Hades might be quick to drag the abuser down to the Underworld for punishment.