John was as cruel as Richard and John had to tax the country into near oblivion to pay Richards debts, including a ransom to Henry VI (Kingdom of Naples emperor (1191-1197), Holy Roman Empire king (1169-1197), Germany). About the only difference between the two is that Richard was an excellent soldier and John was not.
Roger that.
I think John was not a terrible military commander, at least at the X’s and O’s of assembling, moving and deploying troops. His problem was his toxic personality. A nobleman would rebel, John would assemble an army, and bring him to heel, and then three of the noblemen who had just served in John’s army, enraged at his treatment of them, would rebel themselves, at the first opportunity.