Help - options for unhappy freshman

Thank you. He was recently diagnosed during this first semester. SDS did send a letter to all of his teachers. Some reached out and where very supportive, but not all.
A professor decided to ignore the letter and when he reached out, he simply told him to submit the assignments on time without further explanation. He tried to see the professor, but he refuses to see any student (he has no office hours, not even zoom) due to Covid. Even in class, he is not allowed to approach the professor.

The situation has been stressful for him. In his state, he does not have the energy to escalate and so forth, nor does he want to get on the bad side of a professor.
I am equally frustrated, about teachers not being present for students. You would think this is what they get paid for. I have also had to leave my job and travel from overseas to see him through the situation as it was very difficult to get timely medical support.
My conclusion, is that he needs a small school where teachers are willing to get to know the students and not see them as a nuisance leaving everything to TAs that may or may not care.
Anyway, he is trying his best to finish the semester rather than withdraw. After that We will go home for him to rest and reassess.