You have to go to settings and disable everything non core browser related. Including their ad blocker. Then add unlock origin.
That more or less makes it a good standard chromium browser.
I'm not sure I agree, I run Brave with the standard ad blocking (agressive on Youtube though) and it has been smooth sailing, no ads. What's wrong with Brave's ad blocker according to you?
Youtube detects the ad blocker and blocks watching videos.
Might have changed now though
Brave uses uBlock filters, you shouldn't see any difference between them, maybe your filters were outdated?