Why is American shipbuilding so slow that Italian shipyards are being tapped to produce new FFGs? I'm not asking for them to be as efficient as Japan or Korea, but as efficient as a historically pretty corrupt polity like Italy seems like a reasonable ask.

>https://www.twz.com/sea/troubled-constellation-frigate-is-now-at-least-759-metric-tons-overweight
>The U.S. Navy’s future Constellation class frigates are set to be at least 759 metric tons (close to 867 U.S. tons) heavier than expected, a 13 percent increase over earlier estimates. Concerns have previously been raised about how weight growth with the Constellation class design, which was still being finalized as of April, could negatively impact the ships’ top speed and other capabilities. Overall, the frigate program, the entire point of which was to leverage an existing in-production design to help reduce risk and speed up delivery, remains years behind schedule and at risk of ballooning costs

Seriously, why are the US always struggling to build something other than carriers and subs?