Yeah, agreed, Marginalia's more suited to discover small-web type of content.
Another thing that'd be better as a daily driver, but requires manual curation, is to filter out specific domains in your searches. Brave supports that with the Goggles feature, Mojeek calls it Focus. AFAIK Kagi too has a similar feature.
I don't know any search engine that's able to fully exculde paywalled content though.