One possible reason could be the long - standing rivalry between Gryffindor and Slytherin. Ron, as a Gryffindor, might see Draco, a Slytherin, as a symbol of all the things he dislikes about Slytherin house, like their ambition being perceived as self - serving and their often haughty attitudes. Another reason could be personal grudges. Maybe Draco has said or done things to Ron's friends, like Hermione or Harry, and Ron is standing up for them in a rather bully - like way instead of handling it more maturely.
In fanfiction, Ron might bully Draco because of the different ideologies they represent. Ron is more of a follower of Dumbledore's inclusive and kind - hearted approach, while Draco is often influenced by his family's pure - blood supremacist views. This clash of values could lead to Ron feeling the need to put Draco in his place, unfortunately through bullying. It also adds an interesting dynamic to the story as it explores the darker side of characters and how far they can go in expressing their differences.
Perhaps Draco has developed some sort of complex feelings towards Harry. He could be secretly attracted to Harry and treating him like a baby is a way to get closer to him without admitting his true feelings. Or it could be that Draco has changed as a person and now views Harry as someone who needs his support and guidance, just like one would for a baby.
One possible reason could be that Draco has had a change of heart. Maybe he realizes that Hermione is a person worthy of protection regardless of her House or her friendship with Ron. He might have seen some injustice about to befall her from Ron and his Gryffindor bravado getting out of hand.
There could be some misunderstanding between them. Maybe Percy did something that Annabeth misinterpreted, and instead of talking it out like normal people, she decided to bully him. For example, if Percy accidentally took credit for something that Annabeth thought was hers, it could start this negative behavior.
In some fanfictions, at first, Draco might be intimidated by Ron's bullying. But as the story progresses, he could start to fight back, which then makes Ron realize that his bullying is wrong. This realization can lead to a begrudging respect between them. For example, they might find themselves in a situation where they have to work together against a common enemy, and through that experience, they start to understand each other better.
One possible reason could be that Ron has deep - seated feelings for Hermione that he's not fully aware of yet. In the story, he might be subconsciously drawn to her and thus won't leave her alone.
One possible reason could be jealousy. For example, if Harry gets more attention in the wizarding world for his achievements, Ron might feel a bit left out and jealous, leading to an argument. Another reason could be differences in their approach to handling a dangerous situation. Ron might be more cautious while Harry could be more impulsive, and this clash of styles can cause them to argue.
Love. Just like any other character, Draco can be heartbroken in fanfiction. If he loses someone he loves, whether it's a friend or a romantic partner, he could cry. It shows his vulnerability and that he's not just the tough - guy Slytherin he often tries to be.
In the 'harry rejects draco fanfiction', it could be due to the social divide between Gryffindor and Slytherin. Harry, as a Gryffindor, has been taught to distrust Slytherins. Draco's actions towards Harry's friends, like Hermione who is a Muggle - born, also contribute. Harry may reject Draco because he stands for the discrimination that Hermione has faced from Draco and his family.
One reason could be that Hermione is a strong - willed character. In fanfiction, Ron might be depicted in a way that undermines her independence. She wants to be seen as her own person, not just as Ron's love interest.
One reason could be that Ron abandons Harry when he needs him the most. Like in a dangerous situation, if Ron runs away leaving Harry alone to face the threat, Harry would find it hard to forgive such cowardice.