Most professors I know won't provide qualitative feedback on late submissions - you got a very good grade so there was clearly nothing so wrong with it that it would impede your academic progress.

I do have concern about a for profit school that "turns down no one" when training therapists. Not everyone is suited to the role and they have a duty of care, I'd expect some level of screening - given your diagnosis I'd expect them to have assessed your suitability for a career as a therapist especially given your struggles with interpersonal relationships. That you find it so difficult is partly their responsibility if they accept anyone.