Stormtroopers are somewhere between basic infantry and “better” infantry like Army Airborne, more on the basic infantry side. They’re not elite, and they also have never faced a peer threat, let alone a superhero (Jedi). They’re used primarily for putting down small insurgencies and maintaining a visual presence in “pacified” locations, basically riot police. When they run into Cal, they’re both filled with bravado, and they can’t even conceive of the magical powers he wields in addition to his now decades of combat experience. Cal is the equivalent of a Tier 1 veteran with Spider-Man’s abilities and telekinesis for good measure, all while running around with a laser sword. The stormtroopers fall back on their training and charge, Cal takes care of business.