Not sure if my experience is typical or not but that hasn't helped me one bit. When I tried the various signals you listed, that just seemed to encourage YouTu

Not sure if my experience is typical or not but that hasn't helped me one bit. When I tried the various signals you listed, that just seemed to encourage YouTube to show me even more videos/channels similar to the ones I wasn't interested in. It seemed to be more a signal of 'hey, this person will help us identify more videos like this' than 'let's not show this person any more of this type of content'