Thank God DH was acting better last night... I think he needs some kind of therapy yes. That's a good approach if it's approached as something other than self.
Those of us around are made to feel miserable and feel like you have to apologize for anything going right in your own world. You can say something like, you are glad that it's nice outside. Positive statements are met with "well at least SOMEBODY can enjoy it". It's almost like depression is contagious.
It's like BIL's depression has caused their mother to worry excessively and become increasingly demanding and somewhat confrontational.
example: At a dinner, my step-daughter's husband was teasing her because she had been absolutely bawling because of the death of a character in a BOOK she was reading. He said, "I wouldn't cry that much if a real person died"... So, MIL says to him, "you wouldn't be crying if I died"? Now DH seems to think that our son in-law is some kind of monster because of the comment. It's like OMG he was just yapping, and she deliberately tried to start a fight, and yes mission accomplished. It was all teasing and everybody was having a good time until she chose to start trouble.
DH was fine until this stuff started w/his brother a while back. It's like he has been infected. It's no wonder that he is miserable at work, and now hates his job. He used to like what he did, and the people he works with. Now he absolutely hates it, and doesn't like those around him. This all seemed to develop when over the course of BIL's issues coming to the surface. I am sure he brings all that negativity in with him, and the people around him don't like it. If he acts there like he does at home... yea I get it.
Sorry for the rant, it just feels like depression is some kind of force that sucks the life out of everybody around it.