You say he is not the man you married - if you really think that is true, then maybe there is hope. Losing a job is really devastating to some men - produces terrible feelings of inadequacy. Some drink, some watch porn, or find other women - all versions of escapism.
Don't get me wrong - I'm not saying that is is OK for men to do this, just that there is a reason. Maybe if his self worth and self respect could return, he would stop this sort of behavior. On the other hand, maybe he was always like this an you just found out. You know him and we don't - how does it seem to you?