Brave is open source. You can review and compile from source if you have privacy concerns.
To be completely fair, Mozilla is no angel. They installed extensions in people’s browsers without asking for permission, for example. No thanks.
Librewolf is my recommended go-to from a privacy perspective. And Brave is not horrible. If you look at Brave the company, they aren’t any worse than Mozilla the company.
And if you look at privacy features from a purely test driven point of view, Brave is better than Firefox, and Librewolf is better than both.
I recommend you take a look at privacytests.org for iOS browsers to get a better idea of what browsers block what. DuckDuckGo has the best test results in iOS as of this post.
But the “biased results” are
Open source, you can review them for yourself, adjust them, and run them. I have reviewed the tests and they look good to me.
The results don’t put Brave in first.
Beyond attacking the source, what critiques do you have of the tests themselves and the code? Are there any tests that should have been included, excluded, or altered to reduce bias?