It’s gotten really bad over the past few months, but even before GPT was a thing scummy operators just used Mechanical Turk or Fiverr.
I don’t understand why Google is doing so poorly at filtering it out: for a concrete example, searching for terms relating to common semi-trivial problems when programming mainstream platforms like the web, Java, or C# will now result in low-quality, non-authoritative sites like GeeksForGeeks - or even W3Schools always coming up first, with authoritative sources like MDN, the W3/WHATWG, even StackOverflow sometimes being below-the-fold.