He's not the same player he was early this season. That player was fun to watch and could score while still making his teammates better. I'm sure some of it is teams getting film on him and scouting his weaknesses, but it seems his mindset has changed as well. He's pissy with the refs, involving his teammates less, and seems only concerned about getting his. The guy I watched early in the season was fun to watch, really good, and made OU an excellent team. The guy I'm watching now is easy to dislike and makes OU less than the sum of it's parts.
It's a lot for a freshman to handle. ESPN had a ticker on his stats for Saturday, for crying out loud. He may not have been thinking one and done at the beginning of the year, but undoubtedly everyone is in his ear about that now. He may be playing for draft position and thinking he needs to put up amazing numbers. That and better scouting and more defensive focus have probably combined to make him less effective.