Just because "The Internet"'s _mainstream_ may not resemble anarchy, this doesn't prohibit other parts to resemble anarchy. In fact there are a lot of examples active and thriving "on the Internet" fulfilling various definitions of anarchy.

Or it's infrastructure, or design, or all the corporate committees involved in managing it. Care to give counter examples?

p2p crypto trading, p2p mesh networking, self-hosting a website on some open-source hardware...

It's a protocol that's literally not centrally controlled. It's the definition of anarchy. Not "cosmetic anarchy."