The more people who use Brave Search (they own their own index), the better it will become. And right now I'd say it's orders of magnitude better than DDG and the others.
I think it's down to personal preference or something.
I'm 100% convinced that the difference comes down to how searches are formulated. At least, the people who I know that experience poor quality searches seem to enter their queries as natural-language questions rather than search terms.
used brave as my daily search engine for a couple of months and I must say this was not the case for me. Results for global EN topics were indeed better than ddg/bing in some cases (nowhere near an order of magnitude better, though), but results for any non-EN or local queries (think searching for major websites running for 15 yrs) were extremely poor in most cases.