fm, thank you for all that.
In addition to doing the other things you suggest, calm, cool, collected, confident Gardener will hold trusted, deceitful "professional" MC accountable for unethical, behavior which has been acknowledged to me as such by three of his organization's leaders. I'm not on a vendetta: I don't want revenge. I want these issues reviewed and evaluated/validated by peer professionals.
What X did, needed to do, no longer concerns or upsets me.
But others may needlessly be hurt by this charlatan to whom they turn to for help. That should be prevented.

Gardener

"My soul, be satisfied with flowers,
With fruit, with weeds even; but gather them
In the one garden you may call your own."
Cyrano deBergerac