I think this is less an issue with search engines and more of an issue with the world in general.
I know this is not the most erudite quote, but Tim Rogers in his Cyberpun2077 review (on part 6 in the hidden playlist) says the sentence "Signal has lost the war to noise". I believe this is an aspect that pervades everything from the internet, to the physical world. Go to any secondhand shop and it's less likely you find "hidden treasures" than you find some good old things with inflated prices, equal all around. Go to any mainstream bookshop and you'll be hard-pressed to find good editions of good books through all the noise of re-editions of classics and new editions of the romance of the week. Go to YouTube and it's less likely you find a great personal video than you find the nth opinion on a specific kind of media, the nth video essay on the politics of a specific movie, the nth analysis of the contemporary world. Search for any recipe and try to find a personal recipe and not an SEO riddle website with a copy-pasted recipe from god-knows-where. For each day that passes, it seems to me that signal, the culture and objects and things mankind created and should cherish, is being engulfed in the slop, the noise, the copy.
No to be reactionary, a conservative, pining for the olden days of the internet, but I remember not too long ago you could stumble on a website or forum that would surprise you, that would lead you to understand and meet new communities. You would find (shitty, yes) websites dedicated to a specific theme, maintained by someone you would never meet. You felt like you could "travel" around the internet, digital nomad in the true, archaic sense, jumping around various websites. When I got into university, I had a bookmark folder with around 20 websites I would open everyday, multiple times a day just to check for news, about videogames, about books, about anime, with memes, with tips and tricks. They would each have their own "shtick" that made them distinct. And if you wanted, Google, or Yahoo could lead you to 10, 20, 100 more websites each different, each with their own thing.
But now, in the age of algorithms, in the age of bots, and genAI, the noise, the slop, the unhuman is such a large part of everything that you can almost never find the "signal", unless you know how to.
I mean, I don't want to say that places like Agora Road are unique, there are thankfully others like it, but I only got here because I specifically had to go through days of search about this specific kind of place.
It's the same with spotify. For how much shit YouTube should (rightfully) get, when was the last time Spotify surprised you as much as a random YouTube recommendation of an old album? I am a musician and have now a harder time finding truly new and creative music, or old forgotten music, in Spotify. The only place I can somewhat still do it is by venturing into Bandcamp (let's hope it survives) and CD shops that are, incredibly, still open.
Sorry for the rant, this topic awakened some frustration in me and I ended up venting instead of adding to the conversation.