Hello again @just_truth, if the Lord Jesus and the Holy Spirit "got their Divinity" from God the Father, then they could not also be God from everlasting, which means that they could not be God (as there is but One). As God tells us in the Bible, no God was formed either before or after YHWH was .. e.g. Isaiah 43:10; , the God whose ~singular~ Name is also, "the Father and the Son and the Holy Spirit", the Name of God we use during baptism .. Matthew 28:19.
As for who "the Trinitarians" you mentioned above are, that would be ALL of us, as the entirety of the historic Christian Church (Roman Catholic, Eastern Orthodox, Protestant, Baptist, Lutheran, Anglican, etc.) has both believed and taught the Trinity since the First Century, for the simple reason that the doctrine of the Trinity is a summation of what the Bible teaches us about God.
As He told us in the beginning, we were created in His image.
Genesis 1
“Let Us make man in Our image, according to Our likeness..."
The truth is, we constantly bicker and fight over MANY, MANY points of theology (the various churches and denominations that make up the whole of the church, that is), but as far as our Triune God is concerned, there is no debate, because we have all held (and continue to hold) to the exact same beliefs concerning the Godhead, and that, again, for millennia now. So, while you are certainly free to believe whatever you'd like to believe about God personally, the fact that you stand in opposition to every church body within the pale of Christian orthodoxy when you do would, at least, give me pause if I was you, and, no doubt further, give me a reason to take a much deeper look into "why" the church has held/continues to hold to this particular doctrine in such absolute unity with one another.
~Deut
Isaiah 43
10 “You are My witnesses,” declares the LORD,
“And My servant whom I have chosen,
So that you may know and believe Me
And understand that I am He.
Before Me there was no God formed,
And there will be none after Me.”