My mother said to me that she wished I’d never been born

That is one thing that should never be said to a child; there will be other things too, but that is the worst of the worst. If you have low self esteem or depression before that then you are definitely going to feel much worse afterwards, but no child should be told they are unwanted.
Did you ever make it up with your mother, or was it just part of the downward spiral?
Sorry – you don’t need to answer that, but know that sometimes it is good to talk it out of your system. Even with a weird and sarcastic bunch like us.