When you lack the information to make a good recommendation, "the best we can guess from really generic or sparse information" tends to be annoying. That's really bad.

Yes, I watched a bunch of Dota replays during a recent tournament. No, I don't normally go on youtube. So I watched a daily show video clip that was linked. All my "watch next" and "recommended" are Dota. That's not smart, that's aggravating. I would have been ok watching a couple more ds clips, but instead exclusively bad recommendations were made based on poor data.

I dislike the idea that my world gets filtered by algorithms, but I really hate when they're obviously bad at it. Although I suppose I should be grateful that it's easily spotted when it's bad?