But I disagree with your comment about YouTube. I think YouTube recommendations work extremely well, and I only see videos that are related to the 5-6 topics I am exploring on YouTube in the previous few weeks. And when I explore a new topic I start seeing those recommendations instead.
I have never seen a Mr Beast video (or any other video by similar hucksters) on my feed.
You do need to be logged in though. But I use Premium, so that's a given.
I do think that will change though, probably in the near term. YouTube seems determined to push their own shorts. More concerning though, it seems there's now a very strong emphasize on very new content. Several channels have mentioned that videos have to succeed almost immediately and will get little traffic over longer time frames. LTT mentioned this and I've seen it on my own (tiny) channel. I expect this will incentivize publishers to churn out more content more quickly to increase potential success rates, to the determent of quality.
Also, I'm increasingly seeing longer, clearly AI generated listicle-style content showing up in my feeds. I made the mistake of starting one of these a few weeks ago, and now half my feed is similar junk content.
If you accidentally click on something that turns out to be junk, it's vital you go into the "History" section in the sidebar and remove it from there. This removes it from the stuff considered by the algorithm.