The reason what he states for leaving you is totally unjustified and betrayal.
In fact such unsatisfied and greedy people wont be satisfied with the new incumbent too.
They may look for a better one with more riches if the present proposed incumbent is not giving them more.
You have to decide whether you would like to continue unpleasant and torturous married life anymore or to remain in this stranglehold for ever in the name of teaching him a lesson whereas actually suffering the humiliations.
Since he is an Army personnel, he cannot drive you out of the matrimonial house owing to the strict discipline in the military and also his tortures can be checked if a complaint is given against this with the military authorities.
You can see the possibilities and then decide next course of action, in fact you cannot seek divorce within one year from the date of marriage.