I recommend "Quit Deadly Lover (Complete Version)". The female protagonist of this modern romance novel is smart and wise. She's not a weak female protagonist, nor is she a female protagonist who still loves the male protagonist in the end. In the story, the male protagonist was a typical black-bellied man. He was scheming and full of predatory nature. He had a crazy ambition for the female protagonist to pursue power. There were many heart-wrenching scenes, but the female protagonist did not choose to continue to love the male protagonist. Instead, she found her own career and growth. I hope you like this fairy's recommendation. Muah ~😗
The story might take a more somber turn. Snape could become more withdrawn and focus solely on his own pursuits. For instance, he may throw himself into his potions research even more intensely.
One reason could be exhaustion. Naruto has been through a lot in the original story. In a fanfic, if he is continuously put through more and more difficult situations without proper breaks, he might just give up out of sheer tiredness.
The story could take a dark turn. Without his heart, Naruto might become a soulless being, and his friends would be devastated. They might try to find a way to get his heart back. Maybe they search for a powerful sage or some ancient magic that could reverse what has been done.
It could also be that he is tired of the false expectations created by fanfiction. In fanfiction, his character might be portrayed in ways that don't match who he really is. He wants to be true to himself and his ninja way, so he gives up fanfiction.
One possible reason could be a lack of time. Maybe Ash has become too busy with other aspects of life, like work or studies, and can't find the time to write fanfiction anymore.
Perhaps he simply lost his creative inspiration. Fanfiction writing often requires a constant flow of new ideas, and if he's been through a lot of stress or has had some personal issues, like his complex relationship with Lily still haunting him, it could dry up his well of creativity.