I believe that premillennialism is so clearly taught in Revelation 19 and 20 that I still cannot understand how anyone can think otherwise without realizing deep down that they are going against the biblical text. A kingdom reign of the Messiah was just as clearly taught in the Old Testament. Jesus and His Scripture writing disciples also support the notion of an earthly kingdom headed by the Messiah. Such clearness in the Bible provides the likely reason why the early church fathers who spoke on this matter were all premillennialists.
Ice, Thomas D., "A Brief History of Early Premillennialism" (2009). Article Archives. Paper 22.