Yeah the Ford-class is obnoxiously overpriced. There is no way the key metrics of an aircraft carrier (sustained sortie generation rate, survivability, long-term maintenance) improved by the leaps-and-bounds necessary to justify tripling the price compared to a late-model Nimitz-class.
The last Nimitz-class carrier, CVN-77, cost $6.2 billion and was ordered in 2001, while the Ford cost $13 billion and was ordered in 2008. After adjustment for inflation in that period, it's only about 1.5x as expensive.