I had a very similar journey, and I always suspected the my long depression was rooted in rage and anger. I finally got to the real core that stuff in the last year, and just poured it out, unedited, into page after page of a legal journal. The key was being totally honest with myself about how angry I was, not judging myself, and just pouring it out onto paper. Today my life is similar, freedom with occasional glimpses of the old stuff, that I deal with honestly and fairly quickly. Never could have believed life could be this free.