There’s a documentary over the Hillsong Church, called Hillsong: A Megachurch Exposed. Its… something, and not pretty. Here’s the trailer.
It can be found on Discovery+, which has a free 7 day trial. Find it directly on Discovery+ or via Amazon. (Affiliate link)
Viewer discretion is advised.
Yes only 7 days, so you might want to plan your depressing documentary binge watching in advance.
The Church Sofa 