Minuteman is an archaeologist on YouTube who did a multi-part dissection of the Hancock tripe which is worth watching just because he gets angry about it too, then explains why he's angry. It's cathartic.
Some of them are glorified Youtube videos. I don't know why many people bother watching them or why Netflix stretches out 10 minute long stories to 4 hour long docuseries.
I'd go with either terrible or (in the case of "explained") excellent, with not much in between. Even the true crime content is split between great (Mindhunter, The Ripper, Ted Bundy tapes, Night Stalker) and barrel scraping, stretched rubbish (Dirty John, The Watcher). Still the cheapest subscription in the UK so I just cling to the good stuff and dramas.