I really wanted to like DuckDuckGo and I tried it for about a month. But, I kept having to go back to Google when I didn’t get the results I needed. A better mouse trap has to catch more mice.
Google Advanced Search (desktop site) allows customizable date searches. DDG is way behind, but OK for casual use.
Have you tried changing your settings?
90% of the time I will use DuckDuckGo, on rare occasions I will use Google if I can’t find what I’m looking for on DDG. Non political, of course. I do use Apple’s Safari browser.
I will have to look at the others.