Hi PleaseBeFixable, I wasn't reading much when you first arrived, but I remember the desperate and terrified days of my own. It seems like you are making big advances. I know it can be discouraging when you are making progress and come up against something really hard.
I've been so self-centered and constantly in victim mentality and I am trying to see things differently.
why did I do things in the most hurtful ways possible when I didn't have to to get the same things from it.
A big one that has come up a lot is how on a day when I was out with my AP, I didn't answer questions from my husband even though he was worried about me and had told the kids I would be home for bedtime. I could have gotten all the same things from that day and not made him worry or upset the kids, but I made that choice.
I wonder if your mind works like this - I feel like a victim, therefore someone must be oppressing me. The oppressor must be whomever is nearest me - my husband. I am hurt, so he must have hurt me, so I'm going to hurt him back to even the score.
The interruption to this thinking would be - noticing that you feel like a victim, but understanding that's a leftover feeling from previous experiences and that your husband doesn't have anything to do with it, and in fact he can be on your side.
The rewiring of your brain will be when you are in victim mode and instead of reacting to it by hurting him back, or numbing/ignoring the feelings, instead you share it with him. That last thing you will want to do is to tell your oppressor you need help. But the behavior has to come first - the change in belief flows out of doing different behavior and having a different result. That's when your brain gets rewired, through opposite action.
I would think it would be reassuring to your husband when you can say to him - I wanted to hurt you badly because in my twisted brain you were the person hurting me. Now that I understand the mechanism, that you are not actually hurting me, I won't want to hurt you any more.
You'll have to own that you were being as malicious as possible in your effort to hurt him. It might help him if he understands he was a stand-in for whomever you were really trying to hurt.
I had a version of this but not with my husband. After a rape at 13, I basically just wanted to hurt all boys/men. My juvenile messed up brain decided that the best way to hurt boys/men was to have sex and then reject them. Some part of my subconscious was trying hard to stay out of victimhood by hurting other people. I did that for a few years before deciding to drop that part of my life in a lockbox and sink it to the bottom of the ocean. (spoiler! that doesn't work). A few decades later, it wasn't my husband I was trying to hurt, it was the AP. By (and I now realize this makes no sense at all) being sexual with him and rejecting him. It got weird and dark when he tried to do the same thing back (that hadn't happened when I was younger, I was always the rejector) and we were stuck in a loop of who would reject and humiliate the other and walk away. My husband finds it reassuring when he sees that I am happy when I learn that something humiliating, demoralizing, or tragic has happened to the AP, because it affirms that was what was happening instead of that I preferred the AP over him. Very twisted. I pray about it constantly, that I will be untwisted. Or at least that God will love me as the twisted thing that I am, as I stay down on my knees praying instead of dragging others out with me on the Pequod in a suicide mission to harpoon the whale.
For art, how about some kind of kintsuigi?