sadly your best "free" alteratives is going back to the days of smaller, specific communities, and searching through there. If the forum has a bad search, you go back to google but can then use Site:[website.com] as a filter to fine tune your results. .
it's kinda weird how the web has increasingly become optimized for bots - and filled with content created by bots... to the point where as a human you now need a bot to cut through all the bloated SEO bullshit and filter out what you actually want to know...
It seems to be responsive to which sites you want ranked higher/lower. For instance I have wikipedia pinned which resolves a longstanding issue google has had where seo is prioritized over relevancy.
I still don't use it - I can't trust it not to misrepresent what its citations say, and if I have to check the cited pages I might as well just use regular search.
I think in the default windows setup, your bing searches are "integrated" with your user account in some way.
Look, I don't mind the top 2 search results being ads (if you make them visually distinct from the rest), but I don't want all the other crap.
Bing's engine through duckduckgo is better. The ads don't get in your way once you've learned to start reading at the third entry on the page.