My wife was physically/emotionally/mentally abused as a kid. When she's triggered & out of control, she lashes out. Some of the people I've talked to have dismissed what I said like: "Ohh you're a big guy - you can take it". I AM a big guy & I CAN withstand it - but taking blows from someone is undignified and horrible for the relationship/the family/our daughter. I'm at a loss. Help me understand.
PLEASE, PLEASE for the sake of your children (and yourself, of course!) do not "take it." That is complete BS and is absolutely damaging to you, your children, AND to your wife! My mother was like this and this is where my PTSD comes from and starts. It is traumatizing to you. You need to seek professional help. You need to set boundaries with her. When she is in a "repentant" mind and a calm mind (because I'm going to guess she feels bad afterward & wants to be forgiven) --when she is calm you need to calmly tell her that 1) You love her, 2) you love your children, 3) this behavior is harmful and UNACCEPTABLE, and you will take actions if she does it again. Tell her that you accept Her, that you understand she has a condition that she can't control, but if it happens again YOU WILL LEAVE WITH THE CHILDREN, or call the police to get her violence documented. Make no mistake this is Domestic Violence, and you do not deserve it. No one does. If she is out of control, she needs help. There are medications to help her, and therapy to help her to learn how to handle these triggers.
I speak from the child's perspective, and the wife/mother perspective. There is a belief that one can't control themselves when triggered. That is not true, from my personal experience. I had to work hard, very hard, take lots of classes, practice, practice practice -- deal with my past & emotional flashbacks. There is hope. And you can even have a "good enough" family--in time, with work, and may add faith. Because I don't think I could deal with any of this if it weren't for faith.
One thing that helped me when I was in my 20's and I lashed out at my husband when triggered, he said, "Look, no one deserves this. What you just did is wrong" I don't know why, that did something to my brain. There are lots of books out there on how to "help" your wife when in a triggered state, and techniques to use with someone in borderline rage - but the first step is NAME the truth. You don't deserve to be humiliated in front of your children, your children don't deserve it either. Please resist any temptations to retaliate. Remain calm, compassionate, but absolutely firm that this is unacceptable. Be willing to divorce and go the distance for yourself and your kids. I wish my dad had called the police. How I wished he would leave her and take me with him. This has not been an easy journey, but I am well on my way. My heart goes out to you.
EDIT: I just read the thread and see some more your story. Again, my heart goes out to your family. I remember I was certain I had ADHD, but the truth was living in that toxic environment, not knowing when a life threatening event would happen from the ones I loved and were dependant upon, made it impossible to concentrate on things I didn't want to concentrate on. I'm sure your daughter has a hard time focusing in school, when her parents are behaving this way. It's all very confusing. I still stand by having firm boundaries, not "taking it", but also learning how to turn your own switch off. I understand you feel provoked. Keep doing what you are doing, don't give up.EDIT TWO: another thing that stands out that helped me: being told the truth is is that I do not have to "take an offense" That the reality is I choose to "take a offense" I chose to be "offended" I choose to let my pride and ego take offense. I do not have to AT ALL. If some is offended it is because they chose to be.