St. Paul had a disagreement with Pope St. Peter (the issue of whether Gentiles needed to be circumcized as Jewish Catholics were).
While you can definitely read about it in the Book of Acts and segments of it in several of the Pauline Epistles, you are reading about it “after the fact”; you will never see anywhere in writing or in anyone’s narrative of the times, a public exhortation by Paul to the popular opinion, that they should rise up against the Pope, against Peter.
What Paul did with Peter was done in privacy, behind closed doors, with the other Apostles, and then in a closed door Council, whose activities were after the fact made public in a letter to the Gentiles, and in Luke’s book of the Acts of the Apostles.
Today’s priests and bishops do not take Jesus seriously, as Paul, Peter, and the others did, where Jesus described the chain of activity when you had some complaint against “your brother” (your fellow bishop, priest, religious, Catholic). Jesus explicitly told the steps to take, and not once did he say to speak publicly to arouse public outcry to gain power in your complaint.
These public “mutterings” and bishops’ letters, etc., are the words of people who do not know the actuality of the Holy Spirit protecting the Church from the Gates of Hell, so they do not believe they will achieve “truth” if they follow Jesus’ instruction (Matt. 18).