This exact problem winds me up when it comes to sailing channels on YouTube, I get that most people just want to look at attractive people sailing about in exotic locations but I wish there was a way to tell YouTube that if I'm searching about boats I'd actually much rather watch someone's long-term restoration job on a 1970s project boat or a very experienced person talking about sailing in the places I actually live near. There's more of that sort of content than I could watch in a lifetime but it only takes one accidental click and your weeks of carefully training it for 'this, not that' falls apart like wet cake. Surely from the perspective of someone buying ads (admittedly I block them so it's a moot point in practice) they'd rather hawk high-value sailing equipment at me than low-value generic youtube tat I've never shown any interest in?

I know it's very much not in their interest to develop this since your eyeballs are the product but it would be so great if you could explicitly give the YouTube algorithm heuristics like: 'if the context is sailing exclude videos that heavily feature couples/relationships' or 'if the video sounds like that particular breed of shrill, hyperactive vlogger I'm definitely not interested'.