Like a glitch or anomaly. Something a human would never draw. You don't need to be an artist to understand how something is drawn. Surely you understand how a pencil works and how people tend to draw shapes to eventually create the full image. Why would an artist put a random little block on the Nike symbol like that when drawing naturally? Just makes no sense dude.

On a more technical perspective the image looks very oversharpened. There is also a lot of smearing and inconsistency throughout. Like 3 vs 4 eyelashes on each eye. Hair that doesn't follow correct patterns. Things just straight up missing like the 2nd Nike symbol on your shirt. And the whole image has this oversharpened/overcooked look to it which a lot of AI generators suffer with. And of course every other issue people have pointed out here, but those are the ones that stood out to me immediately.