[throwaway69123]

I really wish youtube allowed me to block channels, so over time the quality of videos I do see improves.

[bigtones]

It does allow you to block channels. It's the option "Don't recommend channel".

[throwaway69123]

This seems to be only available on the home page, but thank you I didnt know this exists. Do you know what the option on the video page itself does "Not interested"?

[smt88]

You can block channels. It's in the same three-dot menu that lets you remove individual videos.

[pbhjpbhj]

Quality of channels can go up and down though? Surprised if disliking a couple of vids from a channel isn't enough to prevent getting suggestions for that channel?