As I understand, no amount of words can convince you because I neither know what your standards are, nor I have the right words to convince you to try Firefox again. So, you have to give it a try and see it for yourself.
As a matter of principle, I'd never use a browser which is funded by an advertisement company which lives off my data to show me ads and rob me of my privacy and cognitive capacity.
In my book, Brave is even worse on that matter.
Edit: To clarify: I still have Chrome installed for the odd, unmaintained site which happens to require something Chrome specific, but I just don't open it, since Firefox works for everything and works very well.
[0]: https://arewefastyet.com/win11/benchmarks/overview?numDays=6...