I made DDG my default, and it's great for 95% of my usage. For specific things where I know there should be better results, then I add a !g or !gi to the search query, which redirects to google or google images.
This. Everyone talks up DDG but it is literally one of the crappiest search engine out there. You never get what you want immediately. I think Bing and Searx are better options compared to DDG.
Every time I search for something on DDG and there are no/few results, if I do the same query on Google I only get the insane spam/"hacked small business" websites with random SEO that redirect to arbitrary ads.
And of course Google's own promoted results which are usually only vaguely related to the topic (for example if I search something programming-related, I'll get ads for Udemy or whatnot, but not even a specific course)