You are right about moral depravity, except we're not talking only about moral depravity, but about administratively, in relaxations of discipline, opening the way to usury (which is a matter of the faith, there's a Biblical prohibition), and encouraging occult teaching, Jєωιѕн Kabbala and тαℓмυding influences, etc. These things directly relate to the faith and doctrine. The Conciliar popes, for that matter, don't make any doctrinal proclamations that affect Church dogma or doctrine when they pray at a Mosque or have ecuмenical gatherings like Asissi. But there's praxis or conduct that undermines and is contrary to the faith. Hoffman has docuмented extensively similar conduct of the popes in allowing the publication of occult and Jєωιѕн texts and promotion of associated ideas and of those that promoted them - praxis or executive action affecting the faith.
Btw, have you read Hoffman's book?
No, I haven't read Hoffman's book.
See, most of these examples are passive, i.e. negligence and sins of omission. Where did any of these corrupt popes actively teach grave error to the Universal Church? And not just grave error, but replace the Catholic Church with an institution that lacks the Marks of the One True Church of Christ?
Agreed on usury, evolution (Pius XII), NFP (Pius XII ... opining in front of a group of midwives, not teaching Universal Church), laxity about this, that, or the other thing.
But the Conciliar papal claimants have absolutely actively taught the same errors that they articulated and put into practice at Assisi, and they replaced the Catholic Mass, and have canonized bogus saints.
I just see no comparison between what some/many of these others Popes did (or, rather, didn't do) and what the Conciliar papal claimants have taught and imposed on the Church ... I don't see how they're even in the same category.
This is no difference of degree, but a difference in kind.
If Pope St. Pius V timewarped forward to the time of Pope Pius XII, he would still most certainly have recognized clearly the True Church of Christ, as essentially the same as what it was in his day. If he timewarped to the Bergoglian era, he would most certainly think it some bizarre Protestant sect. In fact, Luther would be appalled by what the Conciliar Church has become.