Denominations were named by humans. Jehovah's witnesses were named by Almighty God Jehovah:
New World Translation of the Holy Scriptures (Study Edition)
10 “You are my witnesses,” declares Jehovah,
“Yes, my servant whom I have chosen,
So that you may know and have faith in me*
And understand that I am the same One.
Before me no God was formed,
And after me there has been none.
11 I—I am Jehovah, and besides me there is no savior.”
12 “I am the One who declared and saved and made known
When there was no foreign god among you.
So you are my witnesses,” declares Jehovah, “and I am God.
To directly answer your question, suppose one court witness told the truth about a crime, and then ten people who came up to testify were paid to contradict him. Does that make the words of the court witness lies? No, a skilled attorney or judge could question the witnesses and find out the truth.
This is what the Almighty God Jehovah and his son Jesus Christ are doing. The world is full of deception, fueled by people who are willing to pay people or give power to them to lie for them.
But there is a smaller group of honest witnesses who will tell the truth.Paul was one of them Acts 17:2-4
Those who want to know the truth will examine the evidence and can learn it. The Bereans were like that, who listened and then checked the scriptures to verify what was said. Acts 17:10-11
This is what is what is going on all over the world, and in this way each person gets the opportunity to decide to accept or reject the truth from the Bible or their own feelings. And this is how Almighty God and Jesus Christ wants it, becuse we will be judged by our decision and our deeds.