Google's web search has gotten worse over the years. Unless of course we want to say that their only truly core product is ads, in which case I'm skeptical but willing to concede that you may be right.
People keep pointing that out, but few want to acknowledge that the web has gotten worse over the years.
When was the last time you stumbled onto a web page written by a caring human author to accurately explain some part of the world just because they're into it? Those kinds of pages used to be all over the web. If you did a search for some random topic, you'd find, essentially, a non-commercial fansite for that exact topic.
But these days, much of the web is commercialized, fewer users know how to write HTML, and people who want to share content typically do so behind walled gardens like Facebook.
Blaming Google's web search for getting worse is like blaming your tour guide when you have a shitty hike because the forest burned down.
Google's web search is less useful today because it puts fingers on the scale of the algorithm, not because the web is worse.
Finding a particular website about a topic isn't the main use case; it's to find a snippet of information, like who played some character on a TV show or whatever.
Publishers certainly don't like it, but it works well for users.
Search results are only as good as the links to content that others make.