You are likening the DMA to China's protectionist laws. China requires 51% Chinese ownership of domestic operations, adherence to CCP censorships laws, etc That benefits domestic companies nothing and foreign companies a lot. It's protectionism.

Whereas the EU laws apply to foreign and domestic companies alike, and the goal is consumer protection. The compliance difficulty does not vary between foreign/local.

This is a common sentiment of EU tech regulation proponents. You may want protectionism but that's not really what these laws are about. Why not simply adopt the CCP's policy towards technology?