I'm sure google's "analytics" say they are doing great and results are more relevant and engaging for them and their corporate partners than ever, but I am often walking away from a search not finding what I know still exists on the web. They are just a massive media conglomerate trying to promote other massive media orgs and their content, content that doesn't live in that bubble is increasingly out of bounds.
That said, DDG isn't that much worse than Google in terms of search quality, and is perfectly fine for more "serious" queries - It's an inferior user experience, admittedly, but I'm willing to drink RC Cola instead of drinking cane-sugar old-recipe Coke that also is contaminated with lead.
Because it's not a fact? Or just a fact in a narrow community you belong to?
I haven't seen anybody using something else for at least 10 years now.