Are you referring to the time when the DuckDuckGo browser was blocking all known trackers except Microsoft trackers? After that information was made public and users complained, DuckDuckGo was able to renegotiate its agreement with Microsoft so that it can block their trackers.
Furthermore, DuckDuckGo now publish their blocklist on GitHub.
It’s worth clarifying that this issue affected the DuckDuckGo browser, not the search engine itself.
So if you were refusing to use DuckDuckGo browser on the basis that they allow Microsoft tracking, then that issue has been resolved now. But if you were saying that this incident has made you lose trust in DDG and that’s why you refuse to use it… well, that’s fair enough. It’s your choice, but I personally would trust DDG more than StartPage, just because StartPage is owned by an ad company.