What differentiates the human being from animal beings is that human beings are able to reason.
If you say that you do not reason then you are calling yourself an animal … which … given that you are reasoning, perhaps incorrectly (through lack of information perhaps) on this thread, you are by definition a human being and rationale.
So…when PR highlights that Justin Martyr in about year 140 ad describes the Catholic Mass, then you have to use your intellect and reason whether the Catholic Church was founded with Constantine.
Even earlier, St Ignatius of Antioch describe the Catholic Church in 110ad, complete with Bishops.
“See that ye all follow the bishop, even as Christ Jesus does the Father, and the presbytery as ye would the apostles. Do ye also reverence the deacons, as those that carry out the appointment of God. Let no man do anything connected with the Church without the bishop. Let that be deemed a proper Eucharist, which is [administered] either by the bishop, or by one to whom he has entrusted it. Wherever the bishop shall appear, there let the multitude also be; by the bishop, or by one to whom he has entrusted it.
Wherever the bishop shall appear, there let the multitude also be; even as, wherever Jesus Christ is, there is the Catholic Church.” Ignatius of Antioch, Epistle to the Smyrneans, 8:2 (c. A.D. 110).
And then ask yourself, why do you no attend a church that does not believe in the Real Presence of Christ in the Eucharist if that is what Christ taught his apostles and they taught their successors? You can read about this too in John chapter 6.