I watched it. Didn't like it. Probably because the audience demographic they are going for seems to be millennials/ the under 40 demographic and that ain't me lol.
They made all drummers look like angry psychotics taking out the abuse they suffered as children by beating their drums. "Loud and in your face" was how they portrayed drummers and playing drums. You gotta be some sorta animal to be a drummer. Play them loud and fast and hard and loud and fast.
They played to the stereotype of what a "drummer is", and they made the documentary for a demographic of punksters under the age of 40 (and maybe aged seasoned punksters over 70 lol).
Disappointed. Offended. That's how I feel about the documentary.