acts like he is a victim and honestly I think he has gone mad.
This is a perfect description of my ex two weeks after the divorce. He is completely irrational, nice one minute, nasty the other, blaming everyone else (especially me, it is apparently all my fault) and becoming quite paranoid.
I would not read too much into it! He is feeling the consequences, losing control, running out of choices. If he is like my ex then he is lashing out with no particular purpose. It is a tantrum. Life was good before, wifey at home and fun on the side, but all that's over now. Boo Hoo.
My advice is to pick your battles. Decide what matters most and work towards agreement on that. I let the rest of it go and ignore, ignore,ignore.