No, actually the Church Fathers believed in the One, Holy, Catholic and Apostolic Church. They were humble enough to first LEARN the Catholic Faith and submitted themselves to the Bishops. They only taught what the Scriptures and Apostolic Tradition taught and never tried to draw believers out of the Catholic Church.
Contrast them with the 16th century church fathers who rejected all that and set in motion 500 years of religious strife and confusion.
There was no Roman Catholic church before 300 ad.. when Constantine add the pagan practices that RC’s embrace today