A friend of mine used to believe that all bosses were jerks. But at the time he had only worked at two different jobs with each job only having one boss.
However, he changed his mind when he moved on to other jobs in which the bosses in most of those jobs were pleasant people who were good to work for.
Having an understanding boss if you have serious issues with depression is key. Those supervisors who aren't so understanding don't realize that some people need to take a day off sometimes due to their illness.
It's one thing if an employee just doesn't feel like working. It's another matter if he or she really can't work because their depression is overwhelming them.