The team is bad, yes. But your statement is hyperbole. Elite QBs (mahomes, allen) would have this offense playing significantly better than it is. Lamb, Ferguson, Colbert, Turpin are not that bad a group.
I doubt they would have the offense playing better than this. Elite QBs are able to raise their game at the crucial moments and bring home a win. they utilize the resources they have.
Mahomes led offense scored all of 9 points in a superbowl loss because his OL had multiple injuries and they couldn't get running game going.
this notion of Elite QBs carry the team on their own and just give them any resource and they will make those players great is total fantasy made up in some fans minds.
again, elite QBs, given resources are able to make the plays to pull out wins.