Your unstated but implied thesis is that the Catholic Church is founded on Simon Magus instead of on Peter. Here is the dilemma for that thesis: either the gates of hell prevailed over the true Church when Simon Magus took the reigns, or you are blaspheming the true Church. Which is it?
-A8
Well, first of all, John 10:33 clearly gives the definition of "blasphemy" as "a mere man, claiming to be God".
Doesn't the Roman Catholic Church claim that the Pope is not just a mere man, but Christ himself, hidden under a veil of flesh. What makes you think that such a church that practices such blasphemy by making a god out of a mere man is the "True Church".
The True Church are those who hear the Word of God and keep it ---- like these from Matthew 24:4,5:
"And Jesus answered them and said unto them, take heed that no man deceive you. For many shall come in my name, saying 'I am Christ', and shall deceive many."
The True Church would not be deceived by one who blasphemes God and claims to be Christ or the Vicar of Christ.