I very much hate them. I know I'm going be the old man yelling at clouds on this one, but I genuinely believe that algorithms are garbage "curators" and no substitute for individual humans (DJs, radio show people) with taste, because algos can (and will) be gamed.
There is no human with music tastes as specific as mine besides me. But an algo can take all of my listening history and recommend whole genres I didn't even know about. I don't think Spotify's is one that can be gamed.
"Serving you things you, an individual, like" and so-called "conspiracy theories" are in no way incompatible.
I'm saying this as someone who's seen a relatively long 'history' of what is popular in hip-hop as an example, and I think there are observable trends that go beyond mere "oh, the kids always like something different from the adults."
You're right, which is why I (as a music nerd) have gone out of my way to ensure that it's more than that. In a nutshell, here's why, despite every reason not to, one could still believe me.
When I as a youngster had to defend hip-hop against my parents, I was able to reference the music itself, see, this comes from that tradition, this sound come from here, roots in African and Black American traditions, this rapper is actually a saxophonist and adopted his style from jazz etc. etc. Citations and sources and the like.
As I've found/seen in entirely too many music conversations today, the kids can't do that. As in, if I'm like "okay, this guy who sounds like he's JUST mumbling, what am I missing here? I'm open minded and used to these conversations, go."
Crickets when you get to this level. They can no longer rely on "But music always changes, why do you hate young people, blah blah."