This is all anecdotal, but something like 90% of my searches are fine in DDG. The rest are for highly specific searches in narrow fields where there just aren't

This is all anecdotal, but something like 90% of my searches are fine in DDG. The rest are for highly specific searches in narrow fields where there just aren't many results at all, or where there's lots of results in another language e.g. Japanese. Google is better at filtering those out.