Didn’t DDG get caught allowing some Microsoft tracking and blocking some search results a couple of years back? Personally I use Firefox and starpage as a search engine.
Personally, I found people to be overreacting and DuckDuckGo‘s actions reasonable and transparent. Here’s the story:
https://techcrunch.com/2022/08/05/duckduckgo-microsoft-tracking-scripts/
I’ve used Startpage until they got bought by an ad company. Haven’t looked into it since then:
I think they had a contractual situation that they were navigating. They were transparent about it and resolved that situation quite quickly.
Edit: Due to using Bing as a backend. It was potentially an uncomfortable bind they found themselves in.