Jesus also referred to God the Father as "our Father". So there are inconsistencies there between "my" and "our" that cannot be fully explained by what you just wrote.I'm still on the issue of power. The relationships I highlighted are relationships of power and authority.
It is not like if Our Father and Jesus played roles that were just "different". The roles they played revealed a clear asymmetry in power.
The asymmetry continued even when Jesus had been resurrected, and even when He had been exalted in heaven. That is why in the Book of Revelation Jesus continues to call His Father not just "God" but "My God".
The asymmetry will continue even after the end of salvation plan, when Jesus delivers everything to God, so that God becomes "everything in everyone".
Certainly, that asymmetry is also present between the believers and Christ. We can be one with Christ, and get his power to work marvels, but we are not Christ. That shouldn't worry us, of course. And we shouldn't worry that Christ is not God. What is important is the kind of unity that Christ keeps with God is the kind of unity we can achieve, through his grace, among ourselves and with Him.
The rider of the white horse is the Word of God, manifested in this concrete, historical context, in Jesus Christ.
The author of the Book of Revelation understood that this exalted being, Jesus Christ, had a God, and that such a God was his Father, as attested since the opening verses of the book (v. 5,6):
To Him who loved us and washed us from our sins in His own blood, and has made us kings and priests to His God and Father, to Him be glory and dominion forever and ever. Amen.
But to leave things even more explicit, Jesus mentions four times in the Book of Revelation that God is not just God, but His God.
Look, I am coming quickly. Hold firmly what you have, so that no one may take your crown. He who overcomes will I make a pillar in the temple of My God, and he shall go out no more. I will write on him the name of My God and the name of the city of My God, the New Jerusalem, which comes down out of heaven from My God, and My own new name. (3:11,12)
If a person refers to a god as his god, it means that person worships that god. Otherwise it would not be his.
So, if Jesus Christ, who has already been exalted, crowned, and placed above anyone else, says He has his god, it is because Jesus worships him.
God cannot worship anyone else, or otherwise God would not be God.
Therefore, Jesus Christ is not God.
Nevertheless, you have in front of you an explicit statement in that "the Word was God" in John 1:1.
(John 1:1) In the beginning was the Word, and the Word was with God, and the Word was God.
So, how does your statement "Jesus Christ is not God" align with the fact that "the Word was God"?