YouTube premium never shows me adds, and downvotes have reliably gotten the AI to stop suggesting a musician or autoplaying a song that I don't like, regardless of their rough membership in a genre I otherwise want to hear.

It makes me feel guilty to downvote someone or their work who's probably a good person, but it's the only reliable way to tune the AI. I get a lot of enjoyment out of music on youtube premium, but would stop using the service if they started airing ads on the pay service, or began serving music in such a way that I couldn't tune the suggestions and automatic play queues.