"It's kind of disappointing how easily the recommendations shift once you click on a video that's sketchy."

It isn't just "sketchy" videos. Someone linked me to a video of a dog being rescued, which I watched on my logged-in profile, and it was fine and all, but explaining to YouTube that that doesn't mean I'm interested in hearing about every dog ever rescued (since I didn't know about the 'delete from history' trick) has been a lot of "Never show me videos from this channel" button pushed.