"But I certify you, brethren, that
the gospel which was preached of me is not after man. For I neither received it of man, neither was I taught it, but by the revelation of Jesus Christ." (Gal. 1:11-13).
You can never claim you were never told.
Oh for goodness sake, neither was the Gospel preached by Peter and the others. This verse proves nothing of what you have been saying.
And no one here has claimed that Paul received the gospel from Peter, but that he was confirmed by Peter as truly commissioned by Jesus.
"But I certify you, brethren, that the gospel which was preached of me is not after man. For I neither received it of man, neither was I taught it, but by the revelation of Jesus Christ." (Gal. 1:11-13).
You can never claim you were never told.
___________________________________________________________________________ You need to understand the nature of Revelation as understood by the Church. Revelation, such as St. Paul is talking about, ended with the death of St. John the Apostle. After that it's development of doctrine, with the Church guided infallibly by the Holy Spirit, as Jesus promised.
Read this. It should answer the questions and difficulties you've brought up in several of your posts, including this one. It's right from the Catechism. It's what the Church believes and teaches.
What is Revelation?
"Public revelation is the special revelation which God began with His direct communication with His inspired prophets and which ended with the death of the last Apostle (Saint John the Evangelist, around 100 AD). This public revelation is also known as the deposit of faith."