How can I block a channel?

I vividly remember this being an option in the past but it's nowhere to be found now.

My algorithm for whatever reason has become completely obsessed with showing me channel posts from some random right winger history page that exclusively posts misinformation and hatred towards whatever people those types of guys are angry about this week. Raises my blood pressure every time I see it, but since these are "posts", not videos in my feed, I have no option to stop all suggestions, no option to block on the channel itself, not even a "stop showing me this asshole 34 times a fucking day" option.

It is ridiculous that users are literally forced to see shit like that. Couldn't imagine being a parent and trying to figure out how to not have my kid drowned in MAGA kool-aid any time he wants to find a YouTube video.