looks like rendering adblockers extensions obsolete with manifest-v3 was not enough so now they try to implement DRM into the browser giving the ability to any website to refuse traffic to you if you don't run a complaint browser ( cough...firefox )
here is an article in hacker news since i'm sure they can explain this to you better than i.
and also some github docs
I've seen a lot of hate directed towards Brave and I don't understand it either. It's my primary browser and it's fine once you hide the crypto stuff, the recent news about it seems to either be positive things about the browser itself or something about their search engine providing API access that's being abused somehow.