I've been using DDG for a few years now as my primary search engine. I would say 99% of the time I can find what I need (just like with Google), and it's super useful with some of their integrations into stack overflow and related sites.

Regarding the results, after a few years, I found that it's not that DDG is worse then Google -- but it's that I was conditioned on how to optimize Google's results. I believe it's because no search engine uses natural language, instead it's language that we think is natural but our brains have optimized for the engine.

Once I came to that realization, I started optimizing my search for DDG just as I had done for Google.