I'm not an expert or an academic historian, but I have taken a lively interest of Catholic history for decades, and have taught it as part of my service as a parish catechist. And I will tell you now, that as far as I know, this pontificate is without parallel. It is uniquely disastrous. Peter's boat is being piloted by a guy who is drilling holes in the hull and inserting sticks of dynamite. Pope Francis is a dedicated foe of Catholic faith and morals.
The "bad popes" of the past --- there have been, by my estimate, about 8 or 9 quite bad ones --- were mostly sunk in their own personal vice, and did not mess with doctrine because it frankly didn't interest them. They were willing to repeat all the right words, anyway, while they were pursuing their courtesans, making their illegitimate sons Cardinals, or besieging cities in southern France.
They may have lived infidelity, but they didn't TEACH infidelity as if it was required by the Ten Commandments.
This one we've got here is different.
The Church will win.
Pray your Rosaries in imitation of Lepanto.