I've been using DDG as my default search engine for several years too. If some results don't seem relevant there are some options:
* Report it to the devs here: https://duck.co/feedback/relevancy/-
so they can make improvements
* Suggest an Instant Answer here: https://duck.co/ideas
, e.g. when I search for "xyz" it would be cool if DDG did "abc".
* Use !bangs, e.g. to search for shoes on Google use "!g shoes" - more info: https://duckduckgo.com/bang