I found that viewing what my ex was saying about me was projection on her part.
Me too. I just changed the pronoun from "you" to "I" and it made sense.
"You (LnL) are self-absorbed and only think about yourself. You don't spend any time with our kid and you treat me like garbage."
"I (n/BPDx) am self-absorbed and only think about myself. I don't spend any time with our kids and I treat you like garbage."
Projection is a crude coping mechanism. It allows them to discharge negative emotions that are too difficult to process and project them onto others where they can experience them from a safe distance.
You know you're a good parent who shows up for S11.