If you are against heavy handed regulations I think supporting the DMA is only logically as those regulations are now coming from gatekeepers such as Apple or Google so limiting them in what they are allowed to do is fully compatible with this mindest I believe.
The Libertarian philosophy is concerned with limiting the powers of government not companies.
I think people are seeing that companies can wield as much power and influence as governments can and yet have no democratic mandate or similar accountability mechanisms that we impose on governments.
