I have to say I used Random Searx a lot, startpage as Backup. And as VPNs are getting mainstream, it gets a pain in the ass. Mullvad Leta sucks too kinda. Now I use duckduckgo alone and actually never need my specially configured SearXNG search providers, although useful.
I have to say, I use a lot of search engines. Using the "Add custom search" Addon on Firefox you can easily add any URL containing a search word to your browser.
I maintain some lists of search engines that need updating.