like the other threads post here ships, either individual or class that should have never been laid down
BW's nominations:
US Zumwalt class destroyers, holy crap those things are expensive vs their actual mission duties and profile... the Maus/King Tiger of destroyers
Germany Bismark class battleships... hugely expensive, poorly laid out; foolishly planned and employed, insuffecient AA armament, poor radar vs contemporaries... resources could definently have gone elsewhere
British Hood class battle cruisers/ Nelson Class battleships poor weight distribution, bad profile for engagements... in Hood class terrible waterline profile and armoring