We have the chicken and egg problem there. Google have that results because it has terabytes of information on everything and that's because millions use it. If more and more people start using DDG, their results will also improve.
> If more and more people start using DDG, their results will also improve.
Let's say everybody stops using Google right now and starts using DDG with its anonymous, proxied queries to Bing. How does this in any way improve search results? You could maybe argue that heavy direct use of bing.com would give Microsoft some useful training data. But none of that changes the fact that Bing's crawlers aren't that good, and neither is its search engine.
See, I'm not willing to do that. I'm not willing to put up with inferior results on the promise that maybe, someday in the future, they might get better.