As I look at the picture of the Church as presented in Acts and by Paul. I certainly do not see any pure vessel. As iimperfect as my local parish is, it is much to be preferred to the Church at Corinth as Paul describes it.
But neither is the Catholic church any better. In the Corinthians church, although it was unheard of for a man to sleep with his father's wife, could you imagine the reaction if any of the book of Acts church leaders had been found molesting little boys?
The Catholic church has NOTHING up on the Corinthian church in terms of purity or morals. It is in no position to point any fingers.