Hover a thumbnail on youtube.com and click an icon at the right: "Not interested" and "Don't recommend channel"
< Feedback on YT: not interested in one click
Same
Well, it works for me, so I can't fix what ain't broke. Either youtube is serving a different site randomly for people or you have an interfering extension/userscript, so try my script in a new profile with nothing else.
i don't know how or why but after trying to troubleshoot and reinstalling 1.1.6 and 1.1.5 a couple of times 1.1.6 suddenly just started working.
1.1.6 is not working properly with chrome 109.0.5414.120. but i've got an old version 1.1.5, that works fine
https://pastebin.com/raw/9V0qGrz9