Mary in the Early Church

Sub tuum praesidium confugimus,

Sancta Dei Genetrix.

Nostras deprecationes ne despicias

in necessitatibus nostris,

sed a periculis cunctis

libera nos semper,

Virgo gloriosa et benedicta.

Amen.

We fly to thy patronage,

O holy Mother of God;

despise not our petitions

in our necessities,

but deliver us always

from all dangers,

O glorious and blessed Virgin.

Amen.

A recent comment from George got me started looking for Mary in the early Church. She's not so hard to find!
This Coptic Christian hymn dates to 250 AD. It was originally written in Greek, then translated to Latin for the western Church. Again, I ask, could these Christians with the teachings of the apostles "still ringing in their ears" have gotten so far off the rails so early on? I guess it's possible, since heresy was always popping up like weeds in the early Church. But we don't find any writings, historical or liturgical, that condemn this type of devotion (not worship) of Mary. If the early Church did indeed think the veneration of Mary was heretical, why didn't we see Augustine, Jerome and some of the great fathers of the early Church writing against it? They certainly wrote against many other heresies: Arianism, Donatism, Maniachism, Monophysitism Pelagianism, Montanism, Marcionism, Ism-Ism etc.