Additionally, DuckDuckGo isn't going to give you better search results than Google or Bing; they come right out and say that they're focused on being an "answer engine" rather than a search engine, the same way Google and Bing have shifted to focusing on answers rather than search results.
So "just use DuckDuckGo" actually solves none of what's wrong with search engines, and suggesting people do that is probably counter-productive at best.