I am so very sorry. I was an unwanted child, and I have found some healing when I could realize that it wasn't ME they didn't want, it was the child they had that they didn't want. I repeat- the child they had, not you. It wasn't the glorious being that was/ is you that they rejected, They could never even see your beautiful essence. It was the parental responsibility and the maturity and humanity which they rejected. You were not at all flawed, they were. Let that be your new mantra.
It's like they say with alcoholics- you're not talking to the person, but the alcohol. They were at a level of sickness we don't even have the words for in our language to accurately express. Dysfunctional, sick, evil, decrepid, insane, defective, inadequate....none of them can describe it well enough. That is why it is so unbelievable for you. It IS absolutely beyond comprehension. In nature, animal mothers will risk their very lives for their offspring. That is the norm. Your particular parents completely failed you. That's on Them, not you.
Parental love is so core to a person's being. Lack of it leaves such a hole in the heart. I PRAY that you can find some peace with it. Bring it here whenever you need to. You aren't alone.