I expect Nelson will get better. most freshmen get better. and he was coming off 2 years of not competing with Covid and the redshirt.
but in the 1st 6 games of last year, Nelson scored in double figures 5 times and was averaging 15.6 ppg and 4.8 apg against very strong competition in this supposedly intricate offense. he wasn't shooting at a high rate, but he was productive.
it went downhill from there. as someone mention, he looked frustrated and not having fun. he was still getting playing time. maybe he was frustrated with the offense, or with Mooney, or with losing, or with teammates, or with the school, or with his own play ... who knows. but the system wasn't too complicated at the start of the year, and historically it's very favorable to PGs.