If you seek spiritual cleansing, the best way to do it is to fast (drink water only for at least 7 days or as many as 21 days). It's helped people before and awakens many people spiritually (and safely). It's humbling and it purges, which I think you might need.
I know you don't like modern day psychology, but you might to try it if nothing else works. Good ones have exercises and techniques for helping with it. Like never talking back to them for example.