I saw this quote by William Gibson:

“Before you diagnose yourself with depression or low self-esteem, first make sure that you are not, in fact, just surrounded by assholes”

If you are then step 2 is to consider the question:

‘Why are you there?’ … what benefit are you getting from being in this situation?

Step 3:

‘What if you left?’ … imagine the consequence of leaving this situation with these assholes and notice any fears.

Step 4:

Find the courage to face into these fears and move towards and through them

Step 5:

Look again at the people surrounding you.