As early as the 2nd century AD Irenaeus, a bishop in modern-day Turkey, wrote that the text in Genesis 1.1 said:

“The Son in the beginning: God established then the heaven and the earth.” (On the Apostolic Preaching, 43.)

But Irenaeus mistranslated Genesis 1.1 from a corrupt Hebrew text that read The Son in the beginning instead of In the beginning God.

Irenaeus also misused other OT texts like Genesis 19.24 (YHWH rained down fire from YHWH); Ps 45.6 (the Son called god); 110.1 (YHWH speaking to Adonai) in order to prove that Jesus is also YHWH God Who created the world.

Again, On the Apostolic Preaching, 47: “So then the Father is Lord and the Son is Lord, and the Father is God and the Son is God; for that which is begotten of God is God. And so in the substance and power of His being there is shown forth one God.”

Yet, other so-called CFs like Tertullian in his Against Hermogenes (3) believed that: “There was a time when neither sin existed with [God], nor the Son.”

Almost 2 millennia later the noted Roman Catholic German scholar Karl Rahner noted how these early writers speak of the God not as a Trinity but as the Father!

“We may outline our results as follows. Nowhere in the New Testament is there to be found a text with ho theos [the God or God] which has unquestionably to be referred to the Trinitarian God as a whole existing in three Persons (God as Trinity)…Thus, for example, the whole Old Testament saving history is ascribed to the God who sent Jesus, thus to the Father (Acts 3.12-26; cf. Heb 1.1). In Acts 4.24, Eph 3.9 and Heb 1.2, the God who created all things is clearly characterized as the Father in virtue of his distinction from the “Son” (“Servant”, “Christ”)…when ho theos is being spoken of, it is not the single divine nature that is seen, subsisting in three hypostases, but the concrete Person who possesses the divine nature unoriginately…”