Reading this "Creed" (which had its basis on an earlier "Creed" produced by an friend of the arch heretic, Arius) in the English language, without any investigation, gives the "sense" of its being Biblical and Orthodox. Which can also be the case if read in the Greek text.
Lets start with the term "begotten" in this Creed (and others), which is claimed to be the same meaning of the term used by the Apostle John. The Greek word being, "Μονογενῆ", which, apart from its "theological" meanings by certain Christian leaders, says nothing of any "begetting". The literal meaning is "of a single kind", or "unique", which is what Greek lexicons by Thayer and Arndt & Gingrich show. The classical Greek lexicon by Liddell & Scott, give the meaning as, "the only member of a kin or kind: hence, generally, only, single". The early Church was being challenged on the Person of Jesus Christ, with leaders like Origen, Lucian of Antioch, and Arius, to name some, who taught that Jesus Christ was "created" by God the Father. The Old Latin New Testament (before Jerome's), rendered, "Μονογενῆ", by "unicus" (unique). However, this was later changed, and adopted in Jerome's Latin Vulgate, by the Latin "unigenitus", which answers to the Greek, "μονογέννητος", and does mean, "only-begotten". This was used by the early Church "fathers" to combat the Arian heresy, and adopted into the Creeds. This was further taken from Origen's heretical teaching of the "eternal generation of the Son from the essence of the Father", thereby making the Father, "Fons Deitatis", which is not taught anywhere in the Holy Bible, and is clearly heretical, as it makes the Father to be the "source" of the "being" of both the Son and Holy Spirit. ""Μονογενῆ", in the Bible when used for Jesus Christ, is done for the "unique" relationship that He has with God the Father, and Holy Spirit, and His Incarnation, as the God-Man. It says nothing about any "begetting, or originating" from God the Father.
Next, we look at the other so-called "Orthodox" terms. "τὸν ἐκ τοῦ Πατρὸς γεννηθέντα πρὸ πάντων τῶν αἰώνων" (begotten from the Father before all ages); "Φῶς ἐκ Φωτός" (light from light); "Θεὸν ἀληθινὸν ἐκ Θεοῦ ἀληθινοῦ" (true God from true God). All of which seem to show the Deity of the Lord Jesus Christ, and His equality with God the Father. Wrong! In each case you will notice the use of the Greek preposition, "ἐκ", which does not mean "from", but, "out of", as "being derived from a source". God the Father is THE "Light", as in the actual "Sun". Jesus Christ is like the "rays" OUT of the Sun, and is "derived". Same with the Deity of Jesus Christ, it is "derived" from the "Essence" of the Father. This is clear from the use of "ἐκ", where we read of Jesus' "begetting" OUT OF the Father, before all ages! This is pure "subordinationism" of the "Essence" of Jesus Christ from the BEING of God the Father., In which case, Jesus CANNOT be "Essentially Equal" to the Father, and therefore must be His INFERIOR. Which is exactly was the "Creed" of Eusebius, which was the basis for the Nicene Creed, taught, and which the "Orthodox" Church, through compromise, adopted!
Next we read of the Holy Spirit, "τὸ ἐκ τοῦ Πατρὸς ἐκπορευόμενον" (Who proceeds from the Father). But notice the same Greek preposition, "ἐκ", used, which again shows "derived" from the Father, and later included the Son. The "Orthodox" Church used John 15:26 for its textual basis for this, but changed the Greek preposition from "παρά" (from besides), to "ἐκ" (out of).
The Holy Bible Teaches that there is One God: The Father, The Son and The Holy Spirit. One Godhead and Three Persons. Co-eternal, Co-essential, and Co-equal, in EVERY way.