Have any of you ever successfully changed multiple major aspects of your lives at once?

Looking for success stories/confirmation bias of any of you who have made MAJOR life changes, multiple at the same time.

I am at rock bottom and have been for years. Literally every aspect of my life is broken. I know they say make one small change at a time, but that isn't working, and it would take more years than I will live if I only change one thing at a time.

Also.... I am struggling with two major addictions and baby steps there aren't working bc then I just turn to the other one to cope.

Cold turkey, full on want to blow up my life. Anyone done it? Any advice?

I do understand the merit of one small change at a time, but it's just not working. My life is unmanageable right now. Rock bottom.