Perhaps Annabeth's dad has some old - fashioned ideas. He might believe that Percy doesn't have the right qualities to be with his daughter. He could also be jealous in a way. Percy is an important person in Annabeth's life and her dad might feel left out or that Percy is taking his place in a sense.
Maybe she is a very empathetic person. Pain stories can be quite distressing, and she might not want to expose herself to that kind of negative emotion.
It could be that the humor or the style of the story doesn't appeal to her. Or perhaps she has had a bad experience related to it in the past. Sometimes, dislikes can be quite random and hard to pinpoint exactly.
He could be trying to teach you a lesson through that story. He thinks it's important and wants to make sure you really understand it, so he keeps repeating it to drive the point home. It's his way of making sure the message gets through to you.
Maybe Tails hates fanfiction because it often goes against the original vision of the character. Fanfictions might portray him in ways that he doesn't like or in situations that are inconsistent with the official story.
There could be various reasons why her father was unwilling to mention her boyfriend. He might be worried that his thoughts or behavior would be affected, or that his boyfriend's identity would bring unnecessary trouble or pressure to his family.
The father may think that the boyfriend is not a reliable person or that some of the boyfriend's behavior or habits do not match his expectations, so he is unwilling to introduce the boyfriend to his family.
Fathers may worry that they won't be able to play the role of a boyfriend, such as taking care of him, supporting him, or getting along well with his family. He may also be worried that his thoughts or expectations will clash with his boyfriend's thoughts or expectations, resulting in an unpleasant outcome.
She needed to understand her father's worries and thoughts and try to communicate with him to understand his thoughts and feelings. At the same time, he had to understand that his father respected his thoughts and decisions and tried to reach a compromise with him. The most important thing was to make sure that she and her boyfriend got along well and could establish a relationship of mutual trust and respect.
Well, perhaps in fanfiction, their characters are often misrepresented. Maybe Percy's personality traits are distorted in a way that makes him seem out of character when paired with Jason, which could lead to Percy seeming to 'hate' Jason in those stories.
In some fanfics, Bucky might be written to hate Steve due to misinterpretations or plot twists. Maybe the writer wants to explore a darker, more conflict - ridden relationship. It could be that Bucky has been brainwashed in the fanfic and his altered mind now sees Steve as an enemy, or there could be some past event that was misconstrued and led to this hatred.