For easy queries, DDG is great, but so is Google. When we reach just mildly confusing queries, the differences are very noticeable. One example from the top of my head: Searching for "devise", a popular ruby gem, yields several unrelated results before the actual Gem on DDG, while Google has the Github page as first result. Due to the popularity of devise I wouldn't rate this as a difficult query, yet problems already emerge on DDG. Multiply that by the number of queries you input daily and it becomes annoying.