"The Elizabeth Holmes of yoga" is a ridiculous framing for this story.

If the accounts are true, Griggs appears to have been a rather unpleasant person, and she stands accused of running a company as though it were a cult of personality -- but I see nothing here to suggest that she actually defrauded her customers. Besides, she died of a rather tragic accident a few years ago. In such cases, it's usually best to speak no ill of the dead who cannot defend or justify themselves.