Obvs there's a lot of joking and hyperbole, along with the accepted fan idiocy (here we are couch potatoes, criticizing elite athletes with crap like "You are trash! Catch the ball! Why can't you tackle?!?" etc).
But seriously - Zach has skill and lots of potential. 2020 wasn't a mirage. So what happened? It seemed like almost everyone gave up on him, even BYU fans, decided he was just no good.
Maybe the mental component, the confidence factor, is the key - and maybe Zach was vulnerable in that way? I'd really like to know.