Blockchain and crypto are both decentralized, which is exactly what Web3 is defined as. Just because they came before federated websites doesn’t mean the definition is exclusive to them. I would call “Web3” ruined, rather I would say that ActivityPub is the first great implementation of it.
PS: The distinction between Web 3 and Web 3.0 is giving me some real USB 3.2 Gen 1 vibes.