IANAL, but this seems more like a classic temper tantrum thrown by a big corp over reasonable legislation.

They could offer an API for security relevant scanning for EVERYONE, including their own antivirus software. But that would make the world better, and make the legislation look justified.

It's the exact same thing with the Google Maps integration on Google Search. They could offer an API and a selection of map provider to the user. That would make Google Search better for the user AND enable competition. Instead they threw a temper tantrum and disabled map integration entirely, so they can blame the EU.