My AH acted the exact same way. Truth is he went to AA, but never worked an honest program. He picked a "sponsor" who wasn't stable (as a cover I'm sure). The moods and verbal abuse continues. I figure dry drunk!?! No!!! He never made it past step 4 (I guess it was too much work). He relapsed on pills and whoa! Talk about a new level of jackassery! He quit meetings all together, became physically dependent on pills and eventually relapsed on alcohol.
My advice- set boundaries and don't engage. Remind yourself that he chooses to act this way and it's no reflection of you. Heck- it probably has nothing to do with you! I'm not divorced but we are separated. I still can get sucked in and have a bad day, but at the end of the day it's not my addiction and I don't want to live miserable like him.