I agree that when he first started going through his 5-Meo process back around 2009 and shortly thereafter, he came off as very blunt and rubbed a lot of people the wrong way. Sincere, but blunt and at times abrasive.
Nowadays, he comes off much more 'gentle' in his podcasts/lectures/interviews. He hasn't changed his beliefs, but his presentation and overall demeanor seem much more tolerable to the masses. Over the last few years, he has been interviewed on many different podcasts...usually giving roughly the same information on each, but he is much easier on the interviewers when their beliefs differ from his.
I also agree there may be other people doing what he did during his sessions that aren't promoting it. But he IS willing to describe his experiences in detail to the world, and was willing to go on video to show his method. For those interested in this type of thing, it could have been very useful.
BTW - I've not heard him say he moves 'dark' energy out of people. To me, using the term 'dark' implies 'evil' or something similar. He certainly does not believe in 'evil' of any kind. He does say he helps remove 'stuck' energy.
He states that he used to occasionally purge the stuck energy for his clients in their initial/early sessions (many of his clients had several sessions) - which seemed to allow them to then have a full release. After a while they would purge on their own if they didn't do it themselves initially. Hard to say what was really happening, but the effect seemed to be that the client was able to move forward in some way.
But after one client tried to kill him by beating the shit out of him a couple years ago during their first hit, he says he started purging for everyone almost right away - possibly his body's way of trying to prevent that situation from happening again. He said he lost about 30 pounds from then on and led him towards his retirement.
He also says during heavy periods, he had 3-5 clients per week. With each client, they usually did 3 rounds of the medicine. He did a full dose with them each round. He did this for about 7 years. After 4000+ doses himself, and watching his clients reactions over that time, I would have felt very comfortable in believing that he knew what he was doing :-)