Is it censorship for them to downrank flat-earth content when you are trying to learn about how to chart a flight? Flat-earthers certainly have a lot of ideas about how charting a course on a flat earth works but that doesn't mean it's helpful to a reasonable person.
At least in their case they truly believe it, with disinformation the entire goal is to exploit DDGs users to pretty much everyone's detriment. Of course if I search for "RT ukrainian conflict" RT should show up, but do you really want your search engine to default to providing results from someone with a very clear agenda and a history of abusing their influence to carry out that agenda?
Of course its possible that the net is too wide, but I find it weird that there is a slippery slope censorship argument going on when search engines have been trying to serve authentic results and beat out inauthentic ones for 20+ years.