Tatum just doesn’t look like he’s having any fun out there
This would be a huge concern if it is a long-term issue.
Maybe he is just a quiet, polite kid with ridiculous amounts of basketball talent who fell into an opportunity his rookie year in the playoffs and ever since, has found himself way in over his head with the other demands of being the best player for the most storied franchise in history. He is just not constructed mentally or emotionally to thrive in that role on such a big stage and it is taking a toll.