In my experience, some ~20 % of recommendations almost always go towards noticably more clickbaity/low-quality content (with rest often fitting quite well, or at least being of a similar level, just on topics that happen to not interest me right now), and as soon as you make the mistake to click one of them it shoots up dramatically. I've taken to open videos I'm not sure about in a private tab to avoid 2 weeks of crap recommendations.