Hi paper
Sorry your mum wasn't good enough to deserve the title mother and there stems the problem.
She wasn't good enough, but you carry the can for her inadequacy.
You feel guilt cause hey it's ya mum and I feel,bad about feeling this about her
I'm angry and frustrated, but she just says sorry I was a shit mum, sort of takes the air out of your tyres really.
It's easy for her to say that, it requires no real thought no action on her part, no need to make any thing up to you, cause hey she's shit right? That just about excuses her everything you feel she did to you.
As far as your CBT is concerned it's not,going to touch the sides of what your feeling, you don't need a coping mechanism, you need talking therapy with someone who understands how to walk you through the process.
Your mum is selfish, out of sight out of mind, you stepped up instantly when she called and your reward was what? Straight back to square one. I won't even bother with your dad that's a whole other conversation.
Your dealing with issues around abandonment my lovely and all the feelings of why weren't I good enough for them to give a shit.
What you start with is what have I been good enough about.
I gave birth I had my beautiful babies all on my own, I found a decent partner and I cracked on,
You are a good enough mum and person, you learnt that about yourself and with no help from anyone else.
Most importantly my darling is you will never make the same mistakes she made, your mum is who she is, sadly she learned those lessons from someone else possibly her parents. Luckily for your kids they skipped a lesson with you.
Chin up lovely 