You didn't ruin your relationship with your mother. It takes two to tango. Your mother was not being kind to you when she ignored what you were going through and kept bringing the subject back to her own life. I hope she recognizes her own misdeeds in your relationship instead of trying to blame you, her child, for all of the problems.

There's nothing wrong with not talking to her for a while. You have a lot to think about, trying to find a job and a stable living situation. Good luck!