My only problem is that, for a show that promised right from the beginning to be about occult rituals, it didn't deliver much of that specific thing. I didn't expect it to end with Rust and Marty crashing a spring clean for the May queen, but I expected more than an old VHS tape of some unnamed unspeakable act. Imagine a mini-series about a "basketball killer" that ends up only including a few seconds of basketball on tape and a climax in an empty basketball court. ("OMG there are vague hints that his daughter might once have played basketball!")
The whole setup of the show was that this crime from 1995 wasn't completely solved by killing Ledoux; it was a conspiracy continuing to the present day, and it was big and went high up, and Rust and Marty would have to overcome their animosity to uncover the full extent of it. But in the end, they really just redid what they did in 1995: got a low-life who did the dirty work.