Some fanfiction alternate endings for 13 Reasons Why could focus on changing the fate of a particular character, like giving them a second chance or a different path to redemption. Or, it could introduce new elements or plotlines that weren't in the original to create a fresh conclusion.
One alternate ending might involve a twist where a previously minor character plays a crucial role in resolving the story. Another could have a happier resolution for all the characters, contrary to the original's tone.
One possible alternate ending could be that Twilight Sparkle uses her magic in a completely unexpected way to stop the wedding chaos and actually uncovers a plot that was much deeper than anyone thought, leading to a celebration of friendship rather than a wedding.
One alternate ending could be that the main character decides to give up their quest and live a simple life instead. This could completely change the tone of the story.
One possible alternate ending could be that the main character manages to escape the war - torn city and finds a peaceful place to start a new life. Maybe he discovers a hidden community that accepts him and he finally gets to experience some normalcy.
One possible alternate ending could be that Carrie realizes her powers don't have to be used for destruction. She uses them to help people instead, like rebuilding the town she damaged. This would show a redemptive arc for her character.
One possible reason could be that the fanfiction deviated too much from the original character traits of Hermione. Fanfiction often takes creative liberties, and if it strays far from what makes Hermione who she is in the original series, it might make her seem out of character, leading to a decision to leave.
Another reason might be that the fanfiction is set in an alternate universe where their relationship has some fundamental differences. For instance, if the vampire - human dynamic is changed in that particular fanfiction, Bella might avoid Edward because she is afraid of the new and unknown aspects of their relationship.
He could be interested in exploring relationships in the fanfiction world that are different from what he experiences in the official story. For example, different friendships or rivalries. Fanfictions can provide a new perspective on these aspects.
One reason could be that the writer wants to explore new storylines without his character. Maybe they feel his arc has reached a natural conclusion in their fanfic universe. For example, if the story has been centered around Tim Drake's detective work for a long time, the writer might decide to shift the focus to other characters by having him leave.
One reason could be that he discovers a new threat and decides he can't stay with the Dursleys any longer for their safety. Another might be that he simply can't bear their mistreatment anymore and finds an opportunity to escape.
One possible reason could be a misunderstanding. Maybe there was a miscommunication between them, like Ginny thought Harry was still too preoccupied with his past traumas and not fully committed to their relationship. Another reason might be external pressure. In some fanfictions, there could be outside forces, such as dark wizards threatening Ginny and she leaves Harry to protect him.