Hi C,
Your experiences with your ex sound so familiar to me. My ex could not stand signs of vulnerability in me. He often became either really angry or passive aggressive if I was in a situation where most people would be compassionate. Like being very ill in the hospital, or loosing a relative etc.
What puzzles me today still is that he can be extremely (and I mean over the top) compassionate towards a complete stranger (say he watched a tv show or read something in the news) and himself. In tv shows he sympathized typically the ”bad guys”

Anyhow, thank you so much for sharing your experience of RAIN meditation. I’ve been meaning to read something from Tara Brach, maybe it is a good time now. I am glad to hear you’ve found comfort in meditation.