We went through the same. A few years of me getting my head on straight and not escalating fights so I could effectively communicate "I don't want to fight about this" and either "this isn't a criticism, this is something that's important to me" or "you're right, I'll start doing that" has made our fighting dry up almost entirely.
Having been on the receiving end of this - don’t keep trying to make it work if it gets to this point. Work on being a grey rock to them (non reactive) until you can get yourself and others to safety.
Also don’t tell them you’re leaving until you have a viable plan B that they can’t find. Kids make it much much harder, and unfortunately around 2 yrs old is often when it gets the toughest and this can happen.
Would either of them stop fighting instantly if there as a gun to their heads or offered a million dollars?
If the answer is "yes", then it's entirely within their control to solve the problem.
The only people I think that fail this are psychopaths, and I think those are rare.
Luckily, she was just stabbing the counter and not me.
My mistake for asking her how she was doing, apparently.
Or at least, that's how it looks from the outside.
I get that people who struggle to control their emotions would push back on that analogy, but I'm pretty accustomed to people creating whatever narrative they need to justify their behavior. Somebody acting badly and then making up a justification is something I deal with nearly every day.
It's hard for me to get a better justification than "maybe your 'personality disorder' is just being an asshole" past Occam's razor.
Is there something I could be reading about this to get a better picture? I know I'm coming at it from a general place of mental health, so, you know, that's not the best lens, but I also know I'm not crazy for thinking like this. Just maybe missing a puzzle piece.
Those who claim that they "can't control themselves" yet somehow manage to be functional adults are lying - they can control themselves, they just can't be bothered.
[0] https://psichologyanswers.com/library/lecture/read/601609-wh...
You can work through it, you just have to care enough. We no longer have arguments longer than maybe 20 minutes now. It can just be personality types and where you are in life.
But a valuable person in your life? You work through that stuff to keep them, even if it's hard.