You need to have nothing left to lose. So sorry you found that out too late. Had I the capacity for it left in me, I would be feeling a touch of guilt over the way things turned out. After all, I was the one who called the forces of darkness to Akane. Her anger was the hole in her defenses.
Anger easily turns to hatred, and hatred to black.
What a fool you were, Ranma Saotome. All my life I only wanted one thing, and that was you. It was being denied you that made me this way. When I found you again, I would have given it all up for you. In the end you wouldn't have wanted any more than that anyway.