@stux It recommends stuff that other people with similar profiles to you have watched, but there are a lot of gullible idiots out there.
A cleaner feed should come from good feedback. When confronted with low quality junk, click the Ellipsis button and then select “not interested”. Liberally use the “don’t recommend this channel” button. Report and flag to get channels demonetised. After a while, the algorithm should stop recommending far-right crap, AI slop, and conspiracy theories to you.