I suppose it's a lot better than FB (we decide what you see), and the navigation model (search & browse a database) is what I want. But overall, it's worse than most porn sites.
These things have feedback loops and 3rd order effects. If discovery worked differently, it's not just what people see that gets affected. Pretty soon, what gets created is affected as the market reacts.
This problem is kind of reminiscent of Google SEO/spam problems, but youtube seems a lot worse than search ever was. SEO-spam, clickbait & stuff that hovers just over the spam threshold.. these are pretty dominant.
"Monetization" was another example of market poorly handled. It just did not reward the kind of thing youtube should want to reward.