20 people would have an impossible time trying to fix the existing web because they would be up against FA*NG companies etc.
But if 20 people design an alternate system (protocol, browser, security features, etc) from scratch, and their incentives are right, yes they could come up with decent protections against users with bad incentives and against bots.
But if 20 people design an alternate system (protocol, browser, security features, etc) from scratch, and their incentives are right, yes they could come up with decent protections against users with bad incentives and against bots.