“Well a few things come to mind,”
I doubt there’s much “mind” involved in what was posted:
“the sale of indulgences,”
Never approved of by the Church.
“the doctrine of Papal infallibility”
Which you can’t probably correctly identify or explain.
“and the assertion of the primacy of the Bishop of Rome over the other Bishops such as the Bishop of Constantinople (The Patriarch), the Bishop of Antioch etc.”
Except for the fact that that was the way it was - as demonstrated by the eastern Churches.
So are you denying that it was a practice of the Catholic Church at the time to sell indulgences? Approved or not, since it went on it was not banned by the Pope at the time it was going on. Priests are men, not God and therefore are inherently fallible regardless of whether they claim they are infallible. The doctrine exists in the Catholic Church, not in the Bible. Third, the Eastern Orthodox churches denied the primacy of the Bishop of Rome over the rest of the churches leading to the Pope and the Patriarch excommunicating each other.
Catholics are free to be Catholic and Protestants and Orthodox are free to be what they are without other Christians criticizing. Concentrate on the threats of Islam and Communism rather than trying to question the legitimacy of other Christians.
And, I'm sorry, but did the Church outright move against the practice? When was there an encyclical against the practice and how were the priests who did it punished? I am genuinely asking, because I really know nothing about the way Rome pronounced them wrong, and immediately wiped them out.
Global warming would have been much worse if there had not been so much cool weather. Explain that, your assertion is similar.