This headline and article is needlessly inflammatory. It looks like the ones dropping DDG have a good point: DDG has betrayed one of its values of being unbiased. People switched away from Google because it was openly biased, now DDG is, too. Maybe I should switch away, too?
What does unbiased even mean? Certainly the goal of a search engine isn't to provide a uniformly random sampling of their index for each and every query. The results must be expected to be biased in some way.
A search engine will rank results, yes, but that's not bias. But when someone who owns or built it changes it due to their political views, that's bias.