According to Bernier what was responsible for the miserable state of the Mughal empire?

Crown ownership of land.

This, then, is how Bernier saw the Mughal Empire – its king was the king of “beggars and barbarians”; its cities and towns were ruined and contaminated with “ill air”; and its fields, “overspread with bushes” and full of “pestilential marishes”. And, all this was because of one reason: crown ownership of land.