One possible reason could be a fundamental disagreement in their goals. Maybe Scott has a new mission that he believes Stiles would be a hindrance to, or perhaps their values have diverged. For example, if Scott becomes more involved with a new group that has a different ideology, he might feel the need to leave Stiles behind to pursue that new path.
The story could take a dark turn for Stiles. Without Scott, he might become more vulnerable and attract the wrong kind of attention. He could end up in a dangerous situation that forces him to grow and become stronger on his own.
It becomes strained. Trust is broken, and Stiles may start to distance himself from Scott. He might not believe in Scott's words or actions anymore, and there will be a lot of tension between them.
It could be that the author of the fanfiction wants to create some conflict. Stiles might hate Scott because Scott has something that Stiles envies, like popularity or a special ability that seems to overshadow Stiles. So, the author uses this emotion to drive the plot and make the story more interesting.
Well, loyalty is a big theme. In many fanfictions, Scott and Stiles' loyalty to each other is unwavering, and they would do anything to protect one another. Also, growth is a theme. We see them grow as individuals and as a duo, learning from their experiences in the fanfiction world. For example, they might learn better ways to handle the challenges that come with their supernatural lives.
Often, these fanfictions explore the deep emotional bond between Stiles and Scott. They might focus on their friendship and how it could potentially turn into something more. For example, there could be stories where Stiles realizes his love for Scott through a series of shared adventures and dangerous situations.
Stiles might initially be shocked. He has been a part of the pack for a long time, and Scott kicking him out would be completely unexpected. He could stand there in disbelief, unable to process what has just happened.
Betrayal is another theme. Sometimes Scott's actions can be seen as a form of betrayal by Stiles, like when he might side with others over Stiles in certain situations. Fanfictions often play with this idea and how they can come back from it.
One popular Stiles and Scott fanfiction is 'The Bond Beyond Friendship'. It delves deep into their relationship, showing how they support each other through various challenges in the supernatural world. Another great one is 'Stiles and Scott: The Untold Adventures' which creates new and exciting storylines for them.
The theme of self - discovery is also present. As they interact more closely in the fanfictions, they often learn more about themselves. For example, they might discover new aspects of their personalities or hidden feelings. This adds depth to their relationship and makes the fanfictions more interesting.