When searching for technical queries Google tends to give much more useful answers - useful is the key word here. To give an example from yesterday, the query 'elixir zlib'.
In DDG I get links to C files in Linux kernels on a server called elixir. I get a useful answer 5 results down (which is fine, it's there). In Google, the first result I get is the erlang zlib documentation (which is what you actually use in elixir).
Things like error messages, queries involving the name of a programming language etc. are often just not as good in DDG.