Would you say your husband's behavior (insults) is typical? Is this something he has done throughout the marriage or only more recent and part of MLC?
When he's home you might want to talk with him about it. Share how much it hurts and how upset it makes you feel to hear these things. Ask him what he might be able to do instead of saying these things. If this is something he has always done throughout your marriage, I wonder where he learned it from.
There is no arriving, ever. It is all a continual becoming.