I can understand why you are flabberghasted by his response to the divorce papers. Grilled food.... r--i-g-h-t... !! I am really peeved at your WH right now. I think he is callous to play you like this, and is completely unaware of the depth of hurt he is creating in your life. You don't deserve it, hon, no-one does. No matter how imperfect or unhappy the WAS was (without the LSB knowing it!).
OK so it is quite clear he is not taking you seriously.
I think you won't achieve NC unless you truly believe you need to break this dynamic.
Are you prepared to pull it together and show him a consistently strong front? Show him you know you are worth more. You don't need to SAY it. SHOW it. It's gonna be hard, and you will backslide, but start walking this path, I reckon. We'll help you (and each other!)