You may not want to realize this, but you are in an abusive relationship. Abuse is not just physical, it's mental.
I came from a loving, wonderful and very BIG family. My father rarely raised his voice, my Mom was amazing. THey loved each other so much. They still do

I was in a very abusive relationship for almost 7 1/2 years. From the time I was 15, I was dating a guy off and on. It ended about a 3 years ago but it's very, very hard to get out of that mentality of being a punching bag.
Rick was rarely abusive in a physical way. So, in my eyes, it really wasn't abuse.
Mostly what he did was make me feel worthless. He didn't work, did drugs, ruined my credit, stole our money but made me feel like I was nothing at all. And I had a degree, had a good job and lots of friends.
My family hated him, my friends couldn't stand him and in honesty, I didn't love him at all. But for reasons that only an abused person would know, I stayed with him.
I came up with a lot of excuses to stay and rarely stood up to him.
We finally broke up after he and my father got in a physical altercation, started by Rick. And Rick demanded I leave with him. It was when I finally said 'enough.'
But I really didn't know how to be in a good relationship or even how to HAVE a good one.
The day I met Michael for the second time, I went to get my car fixed. Rick had come and visited and stole my checkbook. He stole all the money I had, over $5,000.
I felt totally helpless. Even tho we had been apart for over 3 years, he still had some kind of hold over me that I couldnt' explain.
Michael took care of the bills that day and within days, I moved in.
But I tried so hard to be perfect around Michael after that. I felt like if I didn't he'd leave me. And I was an emotional mess the first few weeks.
Michael has amazing amount of patience.
He also got me counseling with the psychologist who had counseled him when his parents were killed and John died.
At first, I really resisted. I thought "I'm not crazy" and was ashamed to go. MIchael went with me for the first few sessions, mostly for moral support.. and to make sure I DID go

I still go every month for a session. I can not tell you how much it's helped me to open my eyes about what I allowed and why I allowed it.
I really, really, REALLY suggest getting counseling for you and the kids. Your kids have learned some really bad lessons and styaing in the house for them isn't a good idea. They are more opt to seeing being abused, abusing drugs and suicide as all normal the longer you stay.
And I don't agree the marriage is first. YOU need to be first.
That was something I had to learn.
There are many low cost options for counseling. GO yourself. If he wants to save his marriage, he will go.
Don't be shocked if he won't go. My counselor said that most times, they know they have a problem and won't go becuase they do not want to change.