It's weird how different my experience is, simply from spanking the algorithm every time it shows me something clickbaity that I haven't already seen.

I actively use the 'not interested' every time the recommendation algorithm tries to show me something where I don't already know what it is. I pretty much only want to see recommended videos I've already watched :)

It takes some patience to get this going, but it seems to work. Any time I see anything novel, it will get excited for a while until I settle it down and tell it I hate all its ideas. Usually I don't have to tell it never to show channels, though if it's obvious enough I will. Eventually it's back to old faves again :)