Its sad to think web 2.0 so long ago was a move towards more human centric websites, UI's, AJAXy sites, etc and now web3 is just a marketing term for fraudsters, exit scammers, shady VC's, and criminals. The late-stage capitalism of the internet is obvious to see.
Web3 never had anything to do with the web. It was always a vain attempt to cash in on the aura associated with web 2.0 by sounding like a legitimate heir to the heritage of the WWW. It is however, as you said, just a convenient marketing term for crypto bros and blockchain scamware.
Web 3.0 as Tim Berners-Lee envisions it might have some legs, but web3 was a always an empty marketing vessel.