:hug: CDKLaw - ouch, that's gotta hurt.
How can I get her to behave in a way that acknowledges my needs due to CPTSD?
Here's the thing, you can't get her to behave in any particular way, no matter how much you want or need her to do it. You have no control over her. None. The only person you have any control over is you. I really struggle(d) with loved ones who have been incredibly verbally hurtful towards me on issues that were very triggering for me because of having PTSD. I spent years thinking if they only understood, then they wouldn't make these remarks. I kept trying and trying to change them. They never changed and it only got worse.
The only thing that worked was for me to change me and begin to set and keep external boundaries about hurtful comments. I also worked on internal boundaries (learning to take in comments that were helpful, and to push away comments that were not helpful), and on how to manage triggers as well.
It was only then - that the cycle of being triggered by the comments, spiraling down, them getting more exhausted and frustrated and lashing out again - began to change. One of my loved ones changed the way they acted, and the other one didn't change, but I don't continue to be exposed to the comments that spiral me down.
Based on the information you have given, this seems like a great situation to use stronger boundaries.
My wife behaves in a way and says things to me regularly that diminish my self-esteem
Identify what are some of the ways she acts and behaves that are difficult. Then identify what is her responsibility and what is yours. Keep in mind that she is responsible for her behavior and comments. You are responsible for your reaction. Even if she completely and totally understands CPTSD, it's up to you to manage your triggers.
Figure out what you would like her to do instead. Be specific. Instead of saying what you don't want, put it as a positive, and tell her what would be helpful.
Figure out what you will do if she continues the behavior. Be specific. One family member of mine became a jerk about my driving. It was beyond backseat driving.... I told them that if they made xyz comments about my driving, I would not continue to drive with them in the car in order to best take care of my needs. They stopped making those comments, and even when they started to do so, I changed how I was handling it in order to limit the amount I was being exposed to the comments.
Once you figured out what your boundaries will be, then find a time where you both are getting along and doing well, and your symptoms are not high, and ask to sit down and gently tell her about your boundaries. What you will do.
For years, I have asked her to learn a bit about
CPTSD to understand what I live with. She has not done this. Why would she not do this if she loves me?
This is totally speculation, but these are a few possibilities: she is a horrible person as a whole, and/or you are in a trauma reenactment relationship with her and she is replaying what some of your original abuser(s) did, or because she is scared to face how much you went through and what it means for you, or she feels helpless to meet the need and doesn't know how to tolerate or communicate that, and/or because you are putting responsibility on her to manage your reaction and she's rejecting that responsibility along with learning about the CPTSD... there are many more possible reasons why.
In the end, only she knows why. Have you asked her why she doesn't want to learn more about it?