Those are some very legitimate concerns and it's understandable how being in that environment would affect you.

Do you believe that your coworkers and supervisors want to help you feel better and improve your life? (do they care about you?)

Do your coworkers and supervisors have a desire to change their behavior and become better people?

If the answer to either of these is "no", do you believe their behavior will improve and is it good for your mental health to remain in that environment?