My problem isn't that I have to filter, but the remaining part is pretty much useless.

Google is worse every day. Bing isn't getting any better either. DDG is of course Bing, with extra filters. Yandex is.. well... for some very niche searches it's actually nice, as long as it's a topic Russians don't care about. But they display a captcha every 2nd click. Marginalia goes only for niche sites, which is great if you are looking for that. But it avoids mainstream. Have been playing with Mojeek recently, but it seems to lack a bunch of websites also.

Personally I'm considering running my personal Marginalia (at least it's open source), with my own sitefilter. But still just considering.