The BPD knows they are doing very bad wrong immoral things when they lie, cheat, manipulate etc... .It's so hard to balance out the anger and the ability to have a sense of compassion for them.
First of all, congratulations on your business endeavours and on moving forward in life!

Second, this line above captures some of the hardest struggles I have getting over my ex. I really really feel for her and all the pain and anger and hurt she expressed to me. I can see that it comes from very deep down and it just seems like she's moving from crisis to crisis in life, with lots of pain along the way. I wish I could help her. I have lots of compassion for her. But I do struggle at other times with anger because she lashed out so hard so often by the end of our relationship, and clearly was trying to hurt me. And the lies, cheating, manipulation, yelling, insulting, back-stabbing, ... .how can I not be angry about it?
I agree with you that it's important not to get lost in analysing, dissecting, and reminiscing. That said, the conclusion I've come to is that my ex seems to "know" what she does is wrong and hurtful in the sense that she feels very uncomfortable when she thinks of it, and how she pushed me away ... .but her mind has some kind of defence mechanism that for the most part prevents her from turning that discomfort into recognition, acceptance, and responsibility for her behaviour. When we were together, if she was starting to feel bad about something she had done, she would either get angry and project, or justify her behaviour and blame me, or initiate sex and work out her emotions that way. Obviously some of those ways of dealing were more enjoyable than others ... .but in the end, it hurts to think that she was never able to honestly and openly take responsibility for her hurtful behaviour. I would have traded even very good sex for that kind of honest and open discussion.
Oh well, it is a hard balance like you say -- I can't help but be angry, but I also love my ex and wish her the best and wish she didn't carry so much pain inside.