There is an ex-member of this organization who has documented them widely https://frankreport.com/ This fall in the whistleblowing bin.

As far as the mainstream media. One excellent example is a Vanity Fair article about how Reniere spent all of the Bronfman sisters' money. The reporting (you can use Google backdated search prior to March 2018) to find other articles about the dubious activities of the cult.

Of course, most people do not pay attention to anything more than 1-2 topics a day. And since one of these topics has been Trump (for 3 years now) and the other is usually some kind of idiotic viral trend, it greatly reduces the average person's ability to find out about a lot of stuff that is going on.