Gresham Law

FreshRSS is a self-hosted RSS feed aggregator, only downside is the language chosen to build it isn’t with security & privacy in mind.
https://github.com/FreshRSS/FreshRSS
FeedMe as a client reader application for the RSS service, again same issue.
https://github.com/seazon/FeedMe
But hey it’s open source & with no deliberate backdoor programmed, none that’s obvious anyways.

You could be dealing with a Spyware poisoning your search engine results or it’s done on a large scale deep packet inspection on the networks you’re using.

In the meantime I recommend Searx, it’s an open-source metasearch engine.

Just to be clear Duckduckgo isn’t at fault & always uses a VPN it’s the least you can do to protect yourself online (If there are financial struggles ProtonVPN is a free & open source reliable alternative.).