A phony doctrine that would not survive a literal hermeneutic of Matthew 16:8,18-19 and 23-25, where Peter was of little faith, was willing to hear and repeat what he heard of the Devil just as quickly as what The God put in his mind, and was given the diminutive nickname "petros" (masculine Koine word for small stone) whereas Jesus in precise Koine (petra, feminine) referred to the massif escarpment He was standing on as figuratively representing the strength of The Father's pronouncement, unwittingly delivered through Simon bar-Jonah's lips, "Thou art The Anointed One, The Son of The God of the living," the rock-solid foundational truth undergirding the faith of the churches of The Christ.
Peter was not a rock, he was a joke, who denied the Savior six times on the dark before dawn, and had to be scolded by Paul many years later for disciplinary action. And Jesus much later on did, after at first withholding the keys to the Kingdom (not of this earth) from Simon (while he was yet unconverted, see Lk. 22:31-32) who permitted himself to fall into Satan's hands, as the others did not.
But after Peter's confession of conversion at Galilee(Jn. 21:15-19), his failure at "leadership" in the flesh without Jesus or the Holy Ghost as his Counselor on the 10 days between the Ascension and Pentecost, and after the gift of the indwelling Comforter on the Pentecostal first-day-of-the-week assembly (his regeneration, his new birth in The Spirit), Christ did finally give him no other keys for opening the doors to heaven than He has given every other regenerated believer-disciple-priest, that of the command to preach the Gospel of repentance, salvation, and reconciliation with The Father of Lights, The Creator.
Of course I will avoid following the false hope you offer through another gospel. Eh? I've been a joke in my own life, but now I follow The Messiah, The Anointed One, not another frail, fallible, phony fakir.
Peter died for the faith, he was not a “joke” as you put it. The people of scripture all had faults and God used each and every one of them to further his message and will.
I am not a Catholic, but I do find your references to one of the founding Saints of Christianity to be offensive and in need of being tempered.