BD - You said the same thing I was about to. DRM - that letter stung me and your W doesn't even know me. No joke, it made me think of something that I plan to work on.
Your W gave you a roadmap to why she is unhappy, how she feels, and what she feels has been wrong. DO NOT TRY to convince her any of it is her fault or anything she is feeling is not correct. Own your stuff and fix it. Let her figure out her own stuff. The good news is you CAN fix these things but you have to want to and know it will be a LOT of work. Reread the letter, if you fix even half the things she said you will be a much better person. Not for her, or even because of her, but for you.
Personality is who the world sees, character is who you are
