What was the problem in the Protestant reformation?

The Catholic Reformation, on the one hand, unflinchingly reaffirmed all disputed doctrines and practices. But tacitly it also accepted the legitimacy of some of the reformist criticisms. Attempts were made to counter popular superstitions through catechizing. Serious efforts were made to reform the structures of the Church so that it could be seen primarily as a spiritual entity. Above all, as in the work of St. Ignatius Loyola and the great Spanish mystics, it responded to that thirst for genuine interiority that has been characteristic of believers in every age.