Isn't DDG a meta-search engine based mainly on search results from Yahoo/Bing and Yandex (from Russia). It is. And that's why it has this rather annoying latency or load time until the search results show up. And the results are only good for English and Russian. To cover up the deficits the return to quick guesses as first results like cached results or snips from Wikipedia, Yelp, etc and some other community curated so called "cook receipts". It's great that DDG exists, and it works great within its constraints, so don't get me wrong.
Ideally, the world needs more internet search engines - as of now only Google, Bing, Yandex, Baidu come to my mind. And various initiatives like Cuil, Wikia Search, etc failed or good ones like Exalead (EU sponsored Google competitor, bought by Dasault), Blecko (bought by IBM for Watson) got bought and vanished for general public but are still active for internal company purposes.
And why do we need more web search engines? Because of the filter bubble, censorship and privacy concerns, etc. - it's never good to have to deal with a mono- or duo-poly (which is already reality, as in most countries on 1-2 of them return really good search results, and the others are barely useable for local native language search phrases).