> I have made several attempts to replace Google Search with DuckDuckGo. But they have all failed and I always ended up changing the default search engine back to Google.

Hmm...

> Brave Search beta is based on an independent index, the first of its kind. However, for some queries, Brave can anonymously check our search results against third-party results, and mix them on the results page.

That's also what DDG does. If you don't like DDG, odds you'll like some even smaller effort are quite to zero.