I stopped using it not because of the results but because you couldn't swipe back without it sending you to the base website.
On DuckDuckGo (and google n others) a search is shown in the URL like looking for frog:
https://duckduckgo.com/?q=frog&t=fpas&ia=web
However in SearXNG it just shows
https://searxng.world/search
Which I don't have an issue with, however when you click on a link and then go back to the search results it would have no idea what you searched for as it's not in the URL and show an error.
That aside, the UI is great. icons don't swap around on you like Google or have annoying popups about 'privacy' like DDG. On the topic of search results, it was good enough for me. Not great but then again there aren't any good search engines right now.