Well, first I'll answer your original question, just so you don't think I am just bugging you for more information.
Yes, I have been through something similar if you mean a horrible divorce and severe depression. Mine was only 14 years long though. I would say traumatizing for myself rather than toxic as well. It involved child abuse, suicidal behavior, infidelity, police, alcoholism, and the death of my dog. And yes, I have come through the other side and am recovering.
I'm so sorry you are going through this. I don't have comforting words for depression. It is never good.
What do you mean she left you after the last episode? Of depression?