Manifest v3 is entirely avoidable. You have the option (on most proper systems) to select a browser for yourself and protest Google's client-side issues. If you're having Manifest v3 shoved down your throat, it is probably your OEM's issue more than Google's.
What isn't competitive and will be scrutinized, is Google's AdSense business.
What isn't competitive and will be scrutinized, is Google's AdSense business.