Even without privacy considerations though, duckduckgo seems to give me better results, I've been using it as my default search engine for years
Are you based in the US? I found them really bad for localized results outside of the US, even when local mode is enabled (although that's annoying to do manually). In the end I used !g for so many search queries that I switched back again.
(I actually do use it occasionally to find specialist retailers so I don't have to use Amazon, as it's easy to buy from any other EU country here. German based retailers for audio equipment, or France based retailers if I want to buy cooking equipment etc)