Brave nor duck duck go can be trusted.
Brave has been known to inject their own referral links in people urls.
Duck duck go serves bing results and has to give Microsoft special acces to do so.
The actual alternatives are:
Firefox based browsers (waterfox, librefox)
Self hosted searxng for search-engine. This one will get results from all possible configurable engine and allow zero trackers.
Notable mention: self hosting isn’t for everyone, startpage.net is to google what ddg is to bing, but it hasn’t had any scandals proving that they give special acces to google yet. Still self hosting is not that hard with docker, i do recommend a local searxng.