Yes, it does contradict the trinity. The man, Jesus, died on the cross. Our Father God is everlasting (Isaiah 40:28) and eternal (Deuteronomy 33:27). He cannot die. God and Jesus are two distinct beings.
Jesus shows He is one in purpose and spirit with God by His prayer in John 17:2. “That they all may be one; as thou, Father, art in me, and I in thee, that they also may be one in us: that the world may believe that thou hast sent me.” Will the trinity expand to include other believers?
In 325 AD, the Roman emperor Constantine convened a council of church bishops at Nicaea to resolve the conflict over whether Jesus was created and other issues. In a compromise, these bishops decided God and Jesus were a duality (“the same substance”). The Holy Spirit was added to this concept some fifty years later to form the trinity doctrine.
There are two scriptures which seem to imply the trinity, without actually stating it: John 1:1 and 1 John 5:7, 8.
John 1:1: This verse should read—“In the beginning was the Word and the Word was towards the God and a god was the Word.” “Towards” is “pros” used in John 1:29, “The next day, John sees Jesus coming towards (to) him.” Of the 99 uses of “pros” in John’s Gospel, it is translated “unto” or “to” 86 times, but not again one time as “with.”
“Towards God” is an idiom that means “pertaining to God,” or, “in the service of God.” The identical idiom is used again in Hebrews 2:17 (NASB),“Therefore, He had to be made like His brethren in all things, so that He might become a merciful and faithful high priest in things pertaining to God, to make propitiation for the sins of the people.” The same idiom is translated as “with God” in Romans 5:1 (NASB) “Therefore, having been justified by faith, we have peace with God
What does “was God” mean in John 1:1?
While Jesus as “the Word” served his heavenly Father (“the God”), he was lower in rank, “a god.” The same Greek word, god, is used for mighty people in power (Israel’s judges) in John 10:34-35 and Psalm 82:6. Additionally, Satan is called the “god of this world” (2 Corinthians 4:4).
Thus, Jesus was the “Word” of God before he was made flesh (John 1:14). He was a mighty one (a god) serving in the things pertaining to (the) God, and he has had this privilege since the very beginning of time.
The trinity concept becomes obviously problematic when John 1:1 and 1 John 1:2 are compared. Both texts are from the same author, written at about the same time, and express the same thoughts. John 1:1 says the Word was “with God,” 1 John 1:2 says the Word was “with the Father.” If John intended that the Word was “God Himself,” he must mean the Word was “the Father.” *
1 John 5:7: “For there are three that bear record in heaven, the Father, the Word, and the Holy Ghost: and these three are one.” This quoted part of the text is not contained in any Greek manuscript which was written earlier than the fifth century. It was added to God’s word.**
For an in-depth study of the false doctrine of the Trinity, read the free online booklet, The Doctrine of Christ, at the following link: https://chicagobible.org/images/stories/pdf/THE%20DOCTRINE%20OF%20CHRIST.PDF
* See the question: “Does John 1:1 teach that Jesus is God?”
** See the question: “Why is it that some Bible verses are removed from the Bible?”