Brave isn’t making an OS or network (yet), but the browser is still critical, to the degree that bigs spend billions on their own, and now privacy law and user blocking demand are reshaping the $330B+ online ad ecosystem. That is a good place to start fighting for the user, imho.
"User" is a perfect encapsulation of the mindset we need to leave behind. For the people who use web browsers, Google's ad tracking is the least of their worries. Here's Schneier: