Same experience here. DDG works fine for getting to that Wikipedia article with a non-obvious title, but any search where I'm less sure of what I'm looking for tends to fall flat on it's face, with zero sites of interest shown with any given search. Local (non-American, and even more so non-English) searches fail consistently.

I'd imagine you could fix some of this problem if you could (massively) prioritise results from certain sites. If Wikipedia, Reddit and Stack Exchange, not to mention the various forums I find during my travels, were consistently pushed to the top, my experience would be a lot better, since then I could at least know with some confidence that the sites I'd expect to get something from don't have what I need.

This would probably necessitate having an account to save those settings, although they do already have a 'block site' feature, which does come in handy. It also necessitate them actually having indexed Reddit and all the various forums for me to be confident that an empty search result really is the result whatever I'm looking for not actually being out there.

I really should try Kagi, to see if its as great as sliced bread. Since if Kagi does search as well as the Google of old, and I can adjust its searches to prioritise results from known good (to me) sites, then that probably is worth paying for; it's just a shame that it's necessary to begin with, since Google already did that for free back in the day.