It's weird, I feel like the people who refuse to use YouTube with an account are the same people who insist all the content is garbage. I use it logged in and ~70% of my recommendations are math videos or other things I would like. When I see something I don't want to watch, I just select "not interested" and I feel like it immediately improves my reccommendations. This way I see maybe one reactionary/misogynist/conspiracy video every two months, and I just don't watch it and say I'm not interested.
On the contrary, I use youtube exclusively without account. I use a Firefox container to ensure cookies don't stick. I follow a bunch of channels via RSS.
