There are rules for instructors as well as 
students. Misconduct on a professional level
(teaching) can often be dealt with. Most colleges 
have review boards for student welfare/etc. My 
freshman year we had a rath noxious literature 
instructor, answering questions correctly in his 
class was as bad as getting them wrong. Anyrate, 
he kind of disappeared, college replaced him 
after 2 weeks. 

If your problem is on a highschool level, you 
might have more problems getting the instructor 
replaced. At any rate, once you get to college, 
the first thing you usually get is the forget 
what you've been told about art speech. Also, 
your  work should speak for you rather, better 
than the instructor, art is communication.

As for stress and other issues, put em to use. 
Emotion is useful. I have no cels of disgust but 
I have a few items from this summer posted at the 
link above, most of which won't be in my 
portfolio ever.