it's quite something having had depression to see how partners feel in having to deal with their depressed partner.
I totally understand your anger and frustration, and I really think you have a right to those feelings, however hard they are to hear.
Depression - for me - was an entity that took me over. I did CBT, it kept me alive, literally. I would have up to 3 sessions a week, 2hrs a pop, depending on how bad I was. Which was bad, as bad as it gets.
The drugs didn't work, i'd have to change to other drugs, up the dosage, up the dosage up the dosage. When on Prozac, I ended up being on such a high dose, I got skin rashes. The last drug I took (I believe) had a bad reaction and ended up with me taking an overdose and ending up on heart monitor in ICU. Oh yes, the psychiatrist I was seeing saw me when I was discharged and gave me another prescription for the drug I'd just ODed on...
Relapses do happen, I understand how your DH can 'keep it together' for work and for the CD, but not for you. Holding it together is EXHAUSTING, literally bone achingly exhausting. Just doing anything is absolutely excrutiating. Depression screws your metabolism too, not just your feelings.
I know you may not take it as such, but the fact that he is not feeling as if he has to keep up pretences in front of you, is actually a positive sign. If he were to mask his real feelings in front of you, he'd be isolating himself from you, and I would seriously worry about his intentions, and the possibility of 'doing something stupid'.
I think I do understand your frustration, but please try to look at this as the seriously life threatening disease that it is, like a cancer or similar, it CAN and does kill you.
I know how sad you are to think that you might have to go through this again, having been in that black pit, I can assure you if he could climb out of it, he would. He would not wish that dark place on his worst enemy.
Can you get some RL support? We can be here for you here of course, but you could do with some RL help in dealing with this.
I agree BTW that he has no business in abusing you, you can remind him of his promise to stop the abuse, and that this is a deal breaker, if he steps over that line, there will be consequenses for him. Gently and calmly, but over and over until he gets it.
Otherwise, the sadbox seems it could be helpful, get him to up the CBT, and look at the dosage, or the medication, course of treatment. Mine got so bad they were talking shock treatment and lithium.
As it was, I ended up taking an overdose, and from the day i left the hospital, kept forgetting to take the pills. In the end, I forgot them so often - had some sort of total mental block over taking anything at all... I realised I'd given up the ADs...
Never looked back. Did a bit of therapy, was pointless, made things worse, so turned my back on that too. I felt at the time that I couldn't get back up, until I had touched rock bottom, till I'd stared the depression/death itself in the face.
Stick with it OP, I'm so sorry you are all going through this misery, I wish I could wave a magic wand and take it all away.