Well, it could really damage his friendships. His friends might be shocked or scared by his outburst and start to distance themselves from him. They may not understand why he lost his temper and think he's become a different person. For example, if he yells at them during his fit of anger, they could take it personally and feel hurt.
His own self - doubt could be the cause. Percy might be constantly thinking that he's not good enough to protect his friends or complete his quests. And one small trigger, like a friend making a harmless joke about his capabilities, could make him lose his temper because it hits too close to home.
One possible reason could be bullying. If Percy is constantly being picked on by other students, it might push him to lose his temper. Maybe they tease him about his appearance, his family, or his abilities. Another reason could be academic pressure. If he's struggling with his studies and feels like he can't keep up, it could lead to frustration and ultimately a loss of temper.
With his friends, it could be a mixed bag. Some friends might support him wholeheartedly, which could strengthen their bond. However, others may be cautious. For instance, if a friend has a close relationship with a particular god, Percy's hatred could cause tension. Also, his attitude towards the gods might make it difficult for him to interact with godly allies or enemies. He may be more hostile towards them than necessary, which could change the dynamics of battles or negotiations.
His hatred might make him more distant from the other demigods who still have some respect or hope for Olympus. They may not understand his extreme feelings and this could create tension.
In this fanfic, it might be that Percy is in a high - pressure situation like a really difficult quest. Things keep going wrong, his team isn't listening to his plans, and he just loses his temper out of frustration. He starts yelling at his teammates, accusing them of not taking things seriously enough.
His relationships would be turned upside down. His friends would be heartbroken and might have to re - introduce themselves to him. Some might become overprotective, while others could be distant, not knowing how to handle this new Percy.
His skill with the bow might make him more respected. Other characters would see him as a valuable asset in battles or hunts. They might rely on him more, which could strengthen their bonds.
His relationship with Sasuke would be greatly affected. Initially, Sasuke might not care much as he's so focused on his own path. But later, he might realize that Naruto was an important part of the team dynamic. Without Naruto, Sasuke may find that he misses the competition and the unique bond they had, which could lead to some self - reflection for him.
His relationships would shift in many ways. With his family, if he has one by that point, they would be deeply concerned and try to help him adjust. His comrades in the Hidden Leaf Village would be more watchful over him. Enemies would likely underestimate him at first, which could be both a danger and an opportunity for Naruto. His relationship with the tailed beasts might also change, as they might be sympathetic towards his new disability and offer different kinds of support or advice.
It could be Draco Malfoy. Malfoy is always taunting Harry and his friends. His constant insults and attempts to undermine Harry might finally push Harry over the edge and make him lose his temper.