SearX is a search aggregator, rather than having its own crawler, and as such a number of its instances getting temp suspensions for running too many requests in too short a time on the various search engines it queries. I still get good enough results from it.
But in terms of a real search engine, I find Brave to be the best.
If didn't use Searx, I would probably be using Brave.
the searx instance I use uses brave and google by default.
I was hoping to be able to use some esoteric ones, but that doesn't seem possible, unless I've overlooked something.
Being able to aggregate a couple of these up-and-coming engines with result reduplication sounds really neat.
Additionally, this new search site (tuxdex.com) appears to just be a private/anonymous version of their existing search site (websearchengine.net) - although websearchengine.net isn't listed as a source for SearXNG either.