It was like this in the past, now it's crappy. The algorithmic optimization started eating its own tail. And it's a problem on all platforms, from Spotify to YouTube.

Let's take YT. In very simple terms, instead of taking a bold move and suggesting a few outliers (similar to differentiating the population as it's done in evolutionary algorithms), it takes an easy shot and, if I'm identified as male, suggests some videos with females with big breasts and other generic junk many people just click on autopilot. It works well for them because most people click and click and spend their days uselessly hooked and feel bad, but in my particular case I lose what I had earlier, i.e. suggestions of interesting bands (they still do happen but the selection is of much lower quality).

This hasn't been my experience at all. Not sure why Youtube would suggest big breasted female artists when I never, ever, ever watch the video when I'm playing music.