OP - you sound like you are in a very dark place
.
I have a close family member who suffered from depression at around your age.
It was like seeing a penny being swallowed by those fairground toys - where you pop them in the slot and they circle faster and faster to the hole.
To keep with analogy, the faster they spiralled to the dark hole, the less they could see/feel/appreciate the light, goodness, support and love they were moving away from.
Yet there really was all that there in their life. Their self perception had become incredibly distorted.
Please see some help OP. With support from their GP and other mental health specialists they are now in a very good place.
I'm not going to pretend recovery happened overnight, but it did come (with some back steps on the way, but overall steady forward progress) and as a close family member I'm so grateful that they did agree to seek help and to all the healthcare practitioners.
You've been a victim of abuse and "blame" for choices you made/didn't make isn't something easily assigned. You really need to talk this through with a professional - preferably someone with experience of domestic abuse.
Please see your GP and get the ball rolling to get some support.
If you feel unable to do that, think about calling Woman's Aid and talking through your issues.