The one that hate as a sysadmin is how Microsoft Defender is always telling me to disable Chrome features such as continue running in the background, third party cookies and password manager but never recommends those actions for Edge.
This is Microsoft Defender for Endpoint that is part of the Microsoft 365 admin portal. It looks for security issues like out of date software and insecure configurations.
Yes and no because the dev would have to maintain two different browsers, one for the eu and one for the rest of the world. It would double the cost of development and testing for something that regular people won't even notice
Chrome almost got a monopoly because for a time, it was legitimately better than most the competition. Now you have consumer inertia, and the things that make chrome dogshit are unfortunately not things that the average person cares out.