It is a big deal. You're traumatised.
I know it sounds crap but have you tried letter writing - not to send but to be able to express the things you wish you could say and then destroy the letters?
As part of a bigger picture it can be helpful.
I would think about ways you can vent your angry feelings that won't harm you or anyone else. Screaming into or hitting pillows, tearing up paper, journaling, sitting in your car with music on and screaming or shouting it all out...
You do need to find ways to release it otherwise you're going to turn into a pressure cooker.
If you can't access trauma therapy right now, would you find reading helpful? To understand and validate your experiences as much as to explore strategies to help you come to terms with their impact on you?
Judith Herman's book Trauma and Recovery does have some good exploration on the impact of emotional neglect on children including as they reach adulthood, and then how to recover. (It also covers interpersonal violence/abuse but you can skip the parts that don't fit with your experiences.)
Lots of people recommend Pete Walker.
I really like a book called Recovering from Trauma through Yoga (David Emerson) - that might actually be a useful practical one for you to help with your feelings of anger in particular? It's a short, easily read book and it's not the kind of yoga that's about stretching and perfect poses or getting fit. I was very, very sceptical but convinced after trying it.
I am really sorry for everything you've been through. I hope that there will be something that will be useful to you in the replies on this thread, even if it's just feeling heard and understood. 