"Medium chill, gray rock, detachment...I know about all of them."
Saying gently,
there is a difference between knowing something intellectually
and actually implementing it. You have posted many comments
by your h that don't have to do with the kids in which you
could begin to use these techniques. Anger and resentment
however, are the biggest obstacles to using them.
If your husband starts yelling at you and you said "I will not
stay in the same room when you are yelling. We can discuss
when we are calmer". What would he do?