I've heard some that have met him question his overall intelligence but then others that have met him say it's because his personality (southern bumpkin?) makes you think he's not smart but say he's actually pretty intelligent.
The OC for NC was absolutely terrible, the play calling was laughable at times.
CJ Stroud was heavily knocked for his lack of football acumen FWIW.
I will say he got no coaching last year, It was like going from McDaniel's to Patricia, I can't underestimate how bad his coaching was last year, also makes me wonder this person is passing blame to Maye for their own incompetence, hard to tell.
It's something that only the teams can answer by in person interviews, if he does struggle with football acumen it would make it harder to teach him what he needs because he has all the physical talent in the world, everything he needs to correct are coachable things but if he can't process the coaching and put it into play then he won't ever come close to his ceiling.