The proof that Christ constituted St. Peter head of His Church is found in, Matthew 16:17-19, and John 21:15-17.
In Matthew 16:17-19, the office is solemnly promised to the Apostle. In response to his profession of faith in the Divine Nature of his Master, Christ thus addresses him:. "Blessed art thou, Simon Bar-Jona: because flesh and blood hath not revealed it to thee, but my Father who is in heaven. And I say to thee: That thou art Peter; and upon this rock I will build my church, and the gates of hell shall not prevail against it. And I will give to thee the keys of the kingdom of heaven. And whatsoever thou shalt bind on earth it shall be bound also in heaven: and whatsoever thou shalt loose on earth, it shall be loosed also in heaven." The prerogatives here promised are manifestly personal to Peter. His profession of faith was not made as has been sometimes asserted, in the name of the otherApostles. This is evident from the words of Christ. He pronounces on the Apostle, distinguishing him by his name Simon son of John, a peculiar and personal blessing, declaring that his knowledge regarding the Divine Sonship sprang from a special revelation granted to him by the Father (cf. Matthew 11:27). He further proceeds to recompense this confession of His Divinity by bestowing upon him a reward proper to himself: "Thou art Peter and upon this rock I will build my Church."
The early christians can reject or accept this,but the Bible clearly says Peter is the rock and hence the first Pope.
All the Church fathers were Catholic and the early Church was too, dont deny fact.
Peace