Anecdotally I've been noticing a steady decline in the quality of google search results for the last ~6 years. The decline has seemed to be accelerating rather than slowing.
If I want news I'll go to the news tab. This also means that my results will shift from day to day very rapidly as new content gets created because it gets precedence in the display.
Of course, news searching is also horribly broken. I tried to find an article (previously found through google news search). I knew when it was published but couldn't recall the site, selecting those date ranges returned 0 results. Selecting all time returned results that included dates within that range, but not the desired article. I eventually found it, by going home and looking in my browser history.