Polytheism is the belief in multiple kinds, not multiple beings. Hinduism is polytheistic. They believe that the cow kind is one kind of God. They believe that the human kind is one kind of God. They believe that the snake kind is another kind of God. God executed judgment on the "Elohim" of Egypt (Numbers 33:4). What was his judgment upon? Upon cattle, upon flies, upon fish and frogs - on various kinds the Egyptians worshiped.
God the kind
Elohim is a kind of being named after God the Father (Ephesians 3:15). Jesus in heaven is Elohim kind. Notice that Aaron made ONE calf (Exodus 32:24, 35) yet even the King James Bible translates Elohim as "gods," not god (Exodus 32:31). Why call one calf "gods"? Because it represented the kind of Elohim. It was to represent what the God kind looked like.
Notice Acts 7:41 which states "a calf" is called gods, verse 40 (and Theoi is the Greek plural). Notice that verse 43 tells us the calf, with other figures, was a way to worship the host of heaven through an image.
Man is the image of God. Jesus said, "if you have seen me you have seen the Father" (John 14:9). He also stated in another place, "he that loves not his brother whom he hath seen, how can he love God whom you have not seen?" (1John 4:20). Catholics do not think that the many images of Mary are really Mary. Every church has a statue to show what they think she looks like to aid in prayer to her, supposedly, in heaven.
Adam the kind
While many are saying God is too great to understand, Romans 1:20 says "the invisible things of him . . . are CLEARLY SEEN, being understood by the things that are MADE, even his eternal power and GODHEAD . . ."
So God (Elohim) MADE the first man and woman and called THEIR name Adam (Genesis 5:2). Adam became a family named after Adam the father. The Hebrew translated man is often "adam." For instance, "man" in Leviticus 24:21 (KJV) states, "he that kills an 'adam' shall surely be put to death." Adam is used many, many times in the law to mean mankind (men and women). In the beginning was the woman and the woman was with Adam and the woman was Adam.
God was not a family until Christ was born. In the beginning Elohim was a kind. Man is a kind. Alligators are a kind. Horses are a kind. The first two of all kinds were created by God. They had no mother or father. God the Father, Adam, and Eve will have something in common that none of the rest of the Family will have - they will not have been born of woman! The first two horses were not born, yet all their born offspring are horse kind. Elohim is a kind of being, the greatest, most awesome kind of Being in the universe!
There is only one kind of spirit being that is Elohim. The other spirit kinds were created by Elohim. God the family (Ephesians 3:15) is named after God the Father. He wants all of mankind to be in his family. Awesome!