This is not the first time I'm saying this but it probably bears repeating: the foundational technologies underlying the web are about as decentralized as they can be, with the current state of technology.

The reason the web is heavily centralized has absolutely nothing to do with the technology, and everything with politics, capitalist ideology, and the social dynamics that result from those.

If you want to "decentralize the web again" then you need to acknowledge this, or you will just be working into the void.