I tried DDG when it first came out and found it unacceptable. Currently though, it's totally usable and sometimes better than Google.
The whole web is organized and optimized more and more for clicks and watch time. It would only make sense that the results seem to be correspondingly worse.
PS: oh, and in a certain way skewed search results even help Google, it increases ranking mysticism. When one site is consistently high, their competitors cannot know wether that is because of artful SEO or because heavy ad-spending is invisibly tipping the scales. So they will fearfully carry their own advertising budget to the altar of search ranking instead of running ads on a competing network like Facebook. Who knows wether The Algorithm considers ad-spend or not, better not provoke an angry god!
There's a lot else on the web, it just isn't surfaced by Google as much as in the search engine's early years.
Google may have gotten worse, duckduckgo may have gotten better (I use DDG for most searches, so not sure) but the case for duckduckgo doesn't involve them having a great search team, since they don't have their own index.
One thing that I keep in mind is that Bing is not blocking DDG searches like google would, I find this commendable and, morally, a point in their favor.
I'm pretty sure DuckDuckGo has a contract with Bing.