I don't know why you're getting downvoted, because the quality has 100% tanked over the last few years. I agree that there may be some selection bias between us, but it's at least got some of my normie non-technical friends commenting about it, so it's not completely without merit. I have a couple of theories, one of them is also a warning.
First, I think search results at Google have gotten worse because people are not actually good at finding the best example of what they're looking for. People go with whatever query result exceeds some minimum threshold. This means when Google looks at what people "land on" (e.g. something like the last link of 5 they clicked from the search page, and then which they spend the most time on according to that page's Google Analytics or whatever), they aren't optimizing for what's best, they're optimizing for what is the minimum acceptable result. And so what's happening is years and years of cumulative "Well, I suppose that's good enough" culminating in a perceptible drop in search result quality overall.
Second, Google has clearly been giving greater weight to results that are more recent. You'd think this would improve the quality of the results which "survive the test of time" but again, Google isn't optimizing for "best" results, they're optimizing for "the result which sucks the least among the top 3-5 actual non-ad results people might manage to look at before they are satisfied". So this has the effect of crowding out older results which are actually better, but which don't get shown as much because newer results have temporal weight.
My warning is this, too, which you've surely noticed: Google search has created a "consciousness" of the internet, and in the 90s it used to be that digitizing something was kind of like "it'll be here forever" and for some reason people still today think putting something online gives it some kind of temporal longevity, which it absolutely does not have. I did a big research project at the end of the last decade, and I was looking for links specifically from the turn of the century. And even in 2009, they were incredibly hard to find, and suffered immensely from bitrot, with links not working, and leaning heavily on archive.org. Google has been and is amplifying this tremendously, by twiddling the knob to give more recent results a positive weight in search. Google makes a shitload of money from mass media content companies (e.g. Buzzfeed) and whatever other sources meet the minimum-acceptable-threshold for some query, versus linking to some old university or personal blog site which has no ads whatsoever. So the span of accessible knowledge has greatly shrunk over the last few years. Not only has the playing field of mass media and social media companies shrunk, but the older stuff isn't even accessible anymore. So we're being forced once more into a "television" kind of attention span, by Google, because of ads.