He was doing stuff like using simulated motorcycles to deliver messages by courier to get around the information blockade, and risky mass attacks to overwhelm individual ships.

This was deemed unrealistic, because… I dunno, Americas enemies would never be desperate enough to use unconventional tactics? There was a legitimate complaint in him being able to negate some of the systems by having inside knowledge of their workings, but at the same time you should probably be prepared for your enemies to have some sort of intelligence on you and your tactics.