It might be due to exclusion. If his teammates constantly leave him out of team activities or strategies, Lance would surely be hurt. For example, they plan important plays without including him, making him feel like he's not an important part of the team.
He could try to communicate with his teammates. By openly expressing his feelings, he might be able to resolve the issues. For instance, he can say 'I felt really hurt when you did X'.
Lance might also choose to distance himself from his teammates for a while. He could focus on self - improvement, like training alone or working on his own skills. By becoming stronger on his own, he can show his teammates his worth and also gain more confidence in himself. For example, he could practice new techniques that he has been putting off, which would not only improve his abilities but also give him a sense of achievement outside of the team dynamic.
One possible reason could be jealousy. Maybe Harry has some special abilities or has received more attention than his mates, which makes them envious. Another reason might be a misunderstanding. Harry could have been misinterpreted by his mates due to some miscommunication or false rumors.
Perhaps there has been a misunderstanding. Maybe Harry did something that was misinterpreted by his mates, leading to their neglect.
It could also be due to outside influence. An enemy might deceive Naruto's team into believing that Naruto has turned against them. The enemy could plant false evidence or use mind - control techniques on the team members, causing them to turn on Naruto without realizing the truth.
One possible reason could be jealousy. Maybe Molly is jealous of Hermione's intelligence and the special bond she has with Harry and Ron. Another reason might be that she feels Hermione is a bad influence on her sons in some way. For example, she might think Hermione's Muggle - born status could bring trouble to the family in the wizarding world which is full of pure - blood supremacist ideas.
Perhaps in the fanfiction, there is a plot twist where Sakura has been brainwashed by an antagonist. The antagonist could be using her to get to Naruto, knowing their close relationship. So, she would then be made to attack Naruto without her own will. Or, there could be a prophecy or some sort of pre - determined fate in the fanfiction's plot that causes Sakura to hurt Naruto, even if she doesn't really want to.
One reason could be that his team discovers some kind of hidden power in Naruto that they fear. Maybe they think he's too dangerous to be around, so they abandon him. Another possibility is that they are influenced by some outside force, like an enemy who convinces them that Naruto is a liability.
One possible reason could be jealousy. Maybe Naruto has some special abilities or is getting more attention in some way that makes his sisters envious. So, they take out their frustrations on him through abuse.
One possible reason could be a misunderstanding. Maybe Peter has been acting secretively about his Spider - Man activities, and his team misinterprets it as him being up to something bad. For example, if he has to disappear suddenly to fight crime, his team might think he's ditching them for other, less noble reasons.