Welcome; glad you dropped in. Sorry for the regrets you listed. We all have different ones, but each one written about, hit a note in my life, too.
Dad was an alcoholic and there were times we should have left. The situation didn't happen; things were let slide. People aren't always nice and we often learn that early.

Our health, our age, our choices aren't always in our own control. We often have to make our lives worth living. I know I did.