Youslop, that's a new one. To get rid of a lot of the garbage UI you can use a Firefox add on called Unhooked. It's very helpful. But obviously what would be better if Youslop was just YouTube again and wasn't corporate garbage.

pixelglade, thanks for the tip! I searched for Unhooked and loved it, I'm already trying it. The YouTube from the "super-duper-warm-n-fuzzy" times of Google would be indeed better, but unfortunately enshittification is the norm now so we have to came up with workarounds. I still like some YouSlop channels so the add on you suggested will help me a lot.