That's a complete distortion of reality and history as the Church existed for around 300 years prior to Constantine, thus going back to the apostles. Plus the Church was not called "Roman" until much more recently whereas what became the "Uniate" churches joined the Catholic Church, so the name "Roman" was added because there are some different rules.
Also, Revelation really has to do with what the Church was experiencing near the end of the 1st century, not the fourth nor today's world.
The "Christian""church" prior to the Council of Nicaea, was a disparity of groups, who did not have a uniform set of pagan dogmas, or a canon. After Constantine's Council of Nicaea, it had a central pagan creed of a triad of gods, and a pagan festival to build around, Easter, the feast of Astarte. The present canon came to fruition via someone present at the Council of Nicaea, Athanasius, from Alexandria. Later, in 380 AD, Theodosius declared the "Nicene Trinitarian Christianity to be the only legitimate Imperial religion entitled to call itself "Catholic". As for the first century, the churches quoted in Revelation, except for apparently two, were on a downward spiral, and unless they repented, would be spit out. Fortunately for the church of Ephesus, they apparently had identified the "false apostle", who was no doubt Paul, and had a chance of recovery (Revelation 2:2).
Wikipedia:
On 27 February 380, together with
Gratian and
Valentinian II, Theodosius issued the decree "
Cunctos populos", the so-called "
Edict of Thessalonica", recorded in the
Codex Theodosianus xvi.1.2. This declared the
Nicene Trinitarian Christianity to be the only legitimate Imperial religion and the only one entitled to call itself
Catholic. Other Christians he described as "foolish madmen".
[14] He also ended official state support for the traditional
Polytheism religions and customs.
[15]
On 26 November 380, two days after he had arrived in Constantinople, Theodosius expelled the non-Nicene bishop,
Demophilus of Constantinople, and appointed
Meletius patriarch of Antioch, and
Gregory of Nazianzus, one of the
Cappadocian Fathers from
Antioch (today in Turkey), patriarch of Constantinople. Theodosius had just been baptized, by bishop
Acholius of Thessalonica, during a severe illness, as was common in the early Christian world.[
citation needed]
In May 381, Theodosius summoned a new ecumenical council at Constantinople (see
First Council of Constantinople) to repair the schism between East and West on the basis of Nicean orthodoxy.
[16] "The council went on to define orthodoxy, including the mysterious Third Person of the Trinity, the Holy Spirit, who, though equal to the Father, 'proceeded' from Him, whereas the Son was 'begotten' of Him."
[17] The council also "condemned the Apollonarian and Macedonian heresies, clarified jurisdictions of the
state church of the Roman Empire according to the civil boundaries of dioceses and ruled that Constantinople was second in precedence to Rome."
[17] The
death of Valens, the Arians' protector, probably damaged the standing of the Homoian faction
