I honestly fail to understand how downranking state-run propaganda that promotes a dictatorship's lies is considered to be a bad thing in a service that is all about providing useful information.

This isn't about silencing a political view, cancelling an unpopular opinion, or whatever. It's defending against a deliberate attack from an oppressive regime. Search engines already have to do a lot of tweaking, for instance to defend against SEO spammers. I don't know how can this be controversial.

Anyway, answering your question, I use and like Ecosia. I've heard good things from Brave Search, but haven't tested it yet.