If you want to watch a good movie about TPB, consider TPB: AFK
It sounds like the new Pirate Bay series is a let down (although I have not seen it myself). But I do remember enjoying this documentary about the trio from 2013.
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Also check out “Steal This Film”
PS also check out https://www.themoviedb.org/movie/991452-pixel-pirate-ii-attack-of-the-astro-elvis-video-clone
Notably produced by the Pirate Bay guys