> Oof. That's really complicated and still doesn't do the trick.
> Concrete example -- when searching Reddit, I can check a box to confine the search to the current subreddit I'm on. That does a wonderful job of restricting results, and... it's one checkbox.
> You don't need to make search feel like filing your taxes to make it better.
I'm surprised at the Reddit example since Reddit's search capabilities are in-fact so awful that people have actually quit the platform for it or have at the very least resorted to using Google to search for specific Reddit threads (doable via Google's advanced search or simply adding the keyword "site:reddit.com").
In fact, the capability you described is present on the Advanced Search form. Look for the row "site or domain" and you can constrain your search to just specific sites.
I think the thing people miss is that Google effectively creates the function you're describing not just by having a multi-field search box (advanced search) but by allowing that to be achieved through just one text box (e.g "site:", "inurl:", "filetype:", and other key words), and for more tailored searches, Google provides entirely distinct UIs such as News, Shopping, Scholar (my favorite), etc.
I suppose I'm just lost as to what the main complaint is. I can't bring myself to work at Google because of how heavily they rely on adtech for revenue, but I can't hate their search.