All software ads exploits. Antivirus software mitigates already exploited systems.

And yes, some antivirus programs are infamous for being difficult to work with, but also remember that any vector that allows a user to easily override antivirus features can also be done by malicious software.

Yup, which is why it's best to stick to whatever Windows has by default if you're using windows.

People should check out some of the CVEs from AV software. Full compromise kinda stuff.