I can't support that the Old Testament Scriptures where Christ didn't exist in the Old Testament? You got to be kidding me. Quit digging your hole.
You failed to rebut
Philippians 2:5–8 (KJV 1900) — 5 Let this mind be in you, which was also in Christ Jesus: 6 Who, being in the form of God, thought it not robbery to be equal with God: 7 But made himself of no reputation, and took upon him the form of a servant, and was made in the likeness of men: 8 And being found in fashion as a man, he humbled himself, and became obedient unto death, even the death of the cross.
John 17:5 (KJV 1900) — 5 And now, O Father, glorify thou me with thine own self with the glory which I had with thee before the world was.
John 3:13And no man hath ascended up to heaven, but he that
came down from heaven, even the Son of man which is in heaven.
John 6:38For I
came down from heaven, not to do mine own will, but the will of him that sent me.
John 6:51I am the living bread which
came down from heaven: if any man eat of this bread, he shall live for ever: and the bread that I will give is my flesh, which I will give for the life of the world.
John 6:58This is that bread which
came down from heaven: not as your fathers did eat manna, and are dead: he that eateth of this bread shall live for ever.
John 1:1–3 (NASB 2020) — 1 In the beginning was the Word, and the Word was with God, and the Word was God. 2 He was in the beginning with God. 3 All things came into being through Him, and apart from Him not even one thing came into being that has come into being.
and you still cannot rebut these
1 Corinthians 10:4 (KJV 1900) — 4 And did all drink the same spiritual drink: for they drank of that spiritual Rock that followed them: and that Rock was Christ.
and
1 Corinthians 10:9 (KJV 1900) — 9 Neither let us tempt Christ, as some of them also tempted, and were destroyed of serpents.
scripture refutes your false claim