Wouldn't this imply the primary he won was literally worthless? It seems the vast majority of Cuomo folks are still voting Cuomo in the general.

NYC uses ranked choice voting, so this poll result is expected. If someone’s first choice was Cuomo in the primary, why should they change that? They can put Mamdani second.

I agree with you, ranked choice voting does make the whole concept of primaries largely redundant. And yes, Cuomo, along with other party bourgeois, is turncoat for not endorsing Mamdani after the primary.

The mayoral race isn't RCV; only the primary is. The actual election is FPTP.