Well there is of course a "Catholic" Church ...meaning widespread body of believers. In that sense, yes the apostles started this movement as eyewitnesses of the resurrection.
But what we think of as the Catholic Church today is really the Roman Catholic Church , which places Jesus mother as a co-mediator with Christ, promotes papal authority, and officially teaches that there is no salvation outside of their organization.
Catholic Catechism #969 “Therefore the Blessed Virgin is invoked in the Church under the titles of Advocate, Helper, Benefactress, and Mediatrix.”
Clearly the Catholic Church has lifted titles for the Holy Spirit and applied them to Mary. The title Mediatrix is the feminized version of Jesus‟ title as Mediator. The RCC makes Mary a co-mediator.
Catholic Catechism # 882 The Pope, Bishop of Rome and Peter's successor, "is the perpetual and visible source and foundation of the unity both of the 8 bishops and of the whole company of the faithful. For the Roman Pontiff, by reason of his office as Vicar of Christ, and as pastor of the entire Church has full, supreme, and universal power over the whole Church, a power which he can always exercise unhindered."
The Pope sees himself as the visible head of God’s Kingdom on earth as opposed to the invisible authority of Jesus Christ. However, early Christians walked by faith, not by sight. (2 Cor. 5:7). Additionally, one of the Pope’s titles is the Vicar of Christ. The word vicar comes from the Latin word vicarius meaning substitution. The on-line version of the Pocket Catholic Dictionary defines the Vicar of Christ as: “The Pope, visible head of the Church on earth, acting for and in the place of Christ”.
However, this is in serious conflict with scripture. Can there be two heads on one body? … Christ is the head of the church: and he is the saviour of the body. - Ephesians 5:23 1994
Catholic Catechism Paragraph # 82 - As a result the Church, to whom the transmission and interpretation of Revelation is entrusted, does not derive her certainty about all revealed truths from the Holy Scriptures alone. Both Scripture and Tradition must be accepted and honored with equal sentiments of devotion and reverence.
Here the Catholic Church demands their own traditions be revered as if they are the word of God. The Watchtower claims the same thing:
Watchtower December 15, 2008, pg 28 – “Our coming to know „the truth‟ - the entire body of Christian teachings that has become part of the Bible - and adhering to it are essential for our salvation”.
Simply put, the Catholic Church, the Watchtower Corporation, and others have made the same mistake that many others have made; they’ve added their traditions, good works, and another mediator to “Jesus the author and finisher of our faith”. (Heb. 12:2) Because of this, they have nullified God’s offer of salvation for some. (Mark 7:13)
There is only one way into God’s favor:
I say unto you, He that entereth not by the door into the sheepfold , but climbeth up some other way, the same is a thief and a robber…Verily, verily, I say unto you, I am the door of the sheep. - Jn.10: 1-7
The NT is a contract between two individuals only... the believer and Christ. There is as BIG difference between the "Catholic" Church (all believers with a one to one relationship with Jesus) and the Roman Catholic Church with their hierarchy and doctrinal heresies.