We've done this song and dance 1000 times: Someone says "DDG is bad" or "DDG is good" and all of the replies are basically "No, DDG is ".
Let's try something new: Let's give examples. I'll go first:
Let's say I have a nebulous recollection that there is a wifi module with "NRF" in the model number. If I search for `nrf wifi` on both Google and DDG, which do you think provides better results?
Let's look at the top URL hits from both (this is in an incognito window, with ublock origin on!):
Google:
1) nordicsemi.com (the manufacturer) homepage
2) press release
3) random Q & A page
4) arduino.stackoverflow.com (question about how to use it)
5) Some blog (someone's guide to using it)
6) nrf.com (National Retail Federation) conference category: wifi and bluetooth analytics (unrelated result, but I can imagine someone going to this conference might google the exact same thing, good thing Google knows to show it...
--- A random box showing questions relevant to the device ---
7) arduino.cc (question about how to use it)
8) (someone's guide to using it)
9) (another page on using it)
10) (sells it)
DDG:
1) (someone's guide to using it)
2) (someone's guide to using it)
3) (someone's guide to using it)
4) (someone's guide to using it)
5) (someone's guide to using it)
6) (another guide to using it)
7) (someone's guide to using it)
8) arduino.cc (question about how to use it)
9) random Q & A page
10) another random Q & A page
As you can see, Google seems to prefer authoritative sources (the manufacturer, the conference that coincidentally has the same name and category), while DDG seems to prefer blogs and how-to guides. I won't say which is better, that's entirely subjective.