Chosen Solution
When I pull the trigger on the blaster, the darts jam inside of it and tend to bend. This simultaneously ruins the darts as well.
The gun may jam due to a faulty spring after being frequently used. It can also be that you may be using the wrong type of darts. Each spring is custom made for each nerf gun based on the darts.
Maybe that the gun has chewed up bullets inside the gun. Try to check the gun and maybe screwdrive the gun apart.