For further explanation of any point, please hit me up :)
It is Chromium based
It has used dubious methods in the past (replacing links with affiliate links, the whole ad/crypto thing, …)
Brave’s business model relies on ads (I think)
[This is a weak point, but at least in the privacy community, Brave isn’t super popular. It feels more geared towards the “hyped crypto early adopters”. ^[1]^ It might be “fine” for someone switching from Chrome (which is always a good thing) but going all the way would be a modded Firefox.]
TL;DR For most provacy concious Brave users, Brave is a step in their journey towards more privacy, and not the final destination.
[1] The “dumb AF tech youtubers” you mentioned in another post are typically the Brave hype crowd. This is not meant to discredit Brave; it’s just that a share of their users are this way.