I'm going through a terrible time, I'm a dev. And last 3-4 months I found the salary has decreased on all openings by a good 20-30%.

I've been at the same company for 15 years. Last year we got a new line manager and he is a bully and makes a lot of our lives miserable, recently he started targeting me. I thought it'd be fine because I can move on with my experience but because of the market I feel trapped and I've now got depression from the stress and being unable to sleep. I take pride in my work and put in more hours than the team but there is no pleasing him and upper management don't care because they love his reports.