As I said before, any unbiased reader of the so-called documents that are attributed to the so-called Early church Apostolic Fathers (they were not the "fathers" of anything but the history of error) will freely admit that they are more Apostolic in character such as Clement, Polycarp and Ignatius but as you continue to read there is a clear and evident transition into more and more error.
For example, these early letters speak of only two kinds of church officers "presbyters" and "deacons" and no pope and no centralized administrative church hiearchy. As you delve further into these writings an ecclesiastical system begins to arise. The seeds of this error can be found in Clement, Polycarp and Ignatius in their over emphasis upon the authority of the ordained members.
As one continues into the Ante-Nicene writings the errors and myths begin to increasingly manifest and by the time you reach Augustine you have a more developed worldly church in union with the Roman secular state and from that point forward the transformation into error increases dramatically.
Hence, the ante-nicene, nicene and Post-nicene in totality is the history of the spirit of antichrist. The true apostolic churches are first called "schismatics" and smeared by identification with individuals who are strange or did strange things and then called "heretics" and hunted down like dogs and killed by the so-called "holy" Roman Catholic church.