Maybe unrelated but what I do when I find a good channel: I click their name, go to their videos tab and look if there’s other good stuff. Often videos a bit older have very few views while the newer one has loads, which makes me think nobody ever clicks through all this.
But I also don’t log in to Youtube. I had a separate Youtube account until they forced me to use a Google account. I can always delete my YouTube cookies when the recommendations get to shitty.