Martyrs of Gorkum
It's the papacy, not the personality who happens to occupy the Petrine Office.
Do you believe in the Real Presence?
Do you believe in Papal Supremacy?
The Gorkum Martyrs did. They died for it.
Most of the Martyrs of England and Wales did as well.
Something maybe was wrong with your catechises - and you converts - something was probably way off with your RCIA. Obviously, apologetics failed you as well. And your theology certificates? I'd suggest burning them.
"Beware of the yeast of the Pharisees."