I think the key is to have a solid understanding of the story and characters. Make sure the plot and art are coherent and don't introduce sudden, confusing elements.
The term 'crashing out worm fanfic' is rather ambiguous. It could be that in this fanfic, there is a worm - like creature or entity, and the 'crashing out' could refer to it escaping from a confined space, or perhaps it could be about a digital or technological 'worm' that is crashing out of a system. Maybe it's a unique take on a known story where the author has introduced these elements to create a new and different narrative.
A rather strange animal crashing story involves a squirrel and a bicycle. A cyclist was riding along a park path when a squirrel, which was chasing another squirrel, ran right in front of the bike. The cyclist tried to avoid it but still ended up hitting it gently. The squirrel scurried off into the bushes, and the cyclist checked his bike to make sure it was okay.
One reason could be corrupted game files. You can verify the integrity of the game files. If you got the game through a platform like Steam, there is usually an option to check for file integrity. If any files are corrupted, the platform will redownload them.
One common reason for crashing during the story in Guild Wars 2 is overheating. Check if your computer's cooling system is working properly. If the CPU or GPU gets too hot, the game may crash. Additionally, verify the integrity of the game files through the game launcher. Sometimes, corrupted files can lead to crashes.