In such fanfictions, one reason could be Percy's ambition. He was often very career - driven and sometimes put his work for the Ministry above his family. This made the Weasleys, who were a very family - oriented group, feel neglected and thus blame him.
Percy's attitude towards authority within the Ministry might also be a factor. If he blindly followed Ministry rules that went against the Weasley family's values, like not believing Harry about Voldemort's return when the Ministry was in denial, it could lead to the family blaming him. They are used to standing up for what's right, and Percy's actions seemed to go against that.
Another aspect could be miscommunication. Percy might not have been able to clearly express his intentions or his loyalty to his family while also trying to succeed in his Ministry career. His family, not fully understanding his situation, could misinterpret his actions as a lack of care for them and start to blame him.
Well, in many fanfictions, Percy might be seen as too ambitious and career - focused. He could have made choices that put his job at the Ministry above his family. For example, he might have supported Ministry policies that the rest of the Weasleys disagreed with, like their stance on Harry Potter or how they were handling the growing threat of Voldemort. This could lead to the Weasleys being mad at him for seemingly choosing the wrong side or not standing by the family values.
Eventually, he may reach a point of self - reflection. After some time, Percy might realize that his family's feelings are also important. He could start to reevaluate his actions and his priorities. In some fanfictions, this could lead to him trying to mend the relationship with his family, even if it's a slow and difficult process.
The Weasleys could also be the ones to reach out first. They might realize that Percy was in a difficult situation at the Ministry and that he didn't mean to cause them harm. So they forgive him and they all work together to face whatever threats are out there, like Voldemort's return.
Often, the Weasleys come to understand Percy's perspective and show remorse by changing their behavior and making efforts to include him again in the family.
One possible reason could be a misunderstanding. Maybe there was a miscommunication about something important, like a plan to fight against the Dark Arts. For example, if the Weasleys accidentally left Hermione out of a crucial part of the plan, she might be very angry.
One possible reason could be that Harry has post - war trauma. He might have seen so much death and destruction during the war that he doesn't want to bring his darkness and pain to the Weasleys. He may think that staying away is a way to protect them from his own emotional turmoil.
One reason could be jealousy. In some fanfictions, if Harry has become very famous and powerful, he might think the Weasleys have different motives for being around him, like using his fame for their own gain. So he starts to lose trust in them.
One possible reason could be jealousy. If Harry gets more attention or power than the Weasleys, they might feel envious and turn against him.
Love could also play a role. Maybe one of the Weasleys falls in love with someone who has a vendetta against Harry. To please their love interest, they could end up betraying Harry. It's a more emotional and complex reason compared to the others, but it can add depth to the fanfiction story.
Maybe in that fanfic, there are misunderstandings between Harry and the Weasleys. For example, they might have had an argument over something like magic use or family values that led Harry to dislike them.