Yes, there are some. You can usually find them on fanfiction websites. Just search for 'Fem Danny Phantom Hates Christmas' on popular fanfic platforms.
It might be that Bella simply doesn't like the overly commercialized and cheery nature of Christmas that is often portrayed in fanfiction. She could be a more somber character who prefers a different kind of aesthetic, and the typical Christmas fluff in fanfiction goes against her character.
One way is to show Bella's reactions whenever Christmas is mentioned in the fanfiction world. For example, she could roll her eyes or make sarcastic comments. This would immediately establish her dislike for Christmas - related fanfiction.
In the fanfiction, the fem Danny Phantom might hate Christmas because it represents a time when she feels most different. If she's a half - ghost, Christmas might be a time when she's acutely aware of not fitting in with either the human or the ghost world. All the normal human traditions and the special 'ghostly' events during Christmas might make her feel isolated. For example, humans are busy with their family dinners and gift - giving, while ghosts might have their own spooky celebrations. She, being in between, has nowhere to belong during this time, thus leading to her hatred for Christmas.
I recommend the book, Love You, It's Hard to Take Back. This novel told the story of a female protagonist who had always been a virgin, but suddenly a child appeared and chased after her, calling her mommy. The female protagonist didn't like children, but this child always ran away from home to freeload, and always brought an older child along to freeload. This novel might meet your requirements for a female protagonist who hates children.
Respect her feelings first and foremost. Stop sharing sex stories around her immediately. If it's something you enjoy, find other like - minded friends to share with.
I recommend the modern romance novel, Goddess of the Abyss, to you. In this novel, the male protagonist hated the female protagonist at first, but he was gradually moved by her as he got along with her and showed his love for her. This story described the conflict and development between the male and female leads, showing the emotional changes and growth between them.