Like it says on this board sometimes when they come out of the tunnel they keep some of their bad traits. I'm sorry it didn't work out for the two of you. If your D, I don't think going dark is going to help either way. I feel it's a way to protect yourself during the MLC rollercoaster ride. I know it's tuff to go dark while living with someone I'm in the same sitch.
Remember not only have you learned alot, but you also became a better person. If you still L your H talk to him and listen. This board has given you many tools to avoid fighting. Even though he won't be in your life, he still might be hurting. I believe an MLC is a sickness, believing this helps me get through the pain.