There is nowhere that the angel of G-d is G-d Himself. If it were, it could drop the "the angel" part. It is always an angel speaking on behalf of G-d.The ANGEL OF THE LORD in the OT is sometimes God himself. When he visited Abraham with two angels, when he fought against Jacob and when he said to Moses "I AM", this ANGEL was God himself. The Word of God isn't a created angel, the Word of God is the spoken Word of God.