So this is a serious question. I am by all definitions a Christian and I've been a Christian for the last seven years almost now. I do worship the Triune God on a daily basis but my question is "is this worship polytheistic?"
Here are some reasons to delight in the Trinity (I can elaborate more if you'd like me to):
1) It's what the Bible teaches and particularly how the New Testament Jews (monotheists) expressed
the reality of God that had been revealed with the coming of the Son. Take a look at John 14-17, Titus 3:3-7, and Romans 6-8 just to scratch the surface this isn't something that was made up just to be difficult, it is the only way to account for the data. Note that the Father, Son and Spirit are all distinct from one another, all share attributes, all exist in close relationship, all have distinct functions in the life of the church and each believer, creation, and redemption.
2) It makes sense of God's essential quality being "agape" (1 John 4:8 "God
IS agape"). Agape love requires at least two people since it is defined as benevolent (other-benefiting) love. You can't "agape" alone. The Father can't have always been the Father if the Son hasn't always been the Son. Jesus can't return to the glory he had WITH the Father, if he hadn't been with and distinct from the Father.
3) It makes sense of the Christian life as participation in the life of God. The Father sent the Son, the Father and Son sent the Spirit in order to bring us into the relationship (family) they have always enjoyed together. Read Ephesians 1:3-14 for more on that. 2 Peter 1:1-4 is helpful too: we are participants in the divine nature. We are "in" one of the Members of the Trinity (the Son - see Romans 6) and we have one of the Members "in" us (the Spirit - see Romans 8, and John 14).
4) It makes sense of Jesus's extreme self-knowledge and Yahweh-only actions : receiving worship, forgiving sins (Psalm 51:4, walking on water (see Job 9), calming the storm (see Psalm 65: 5-7), having all authority and judgement (John and Matthew 28:19
5) Jesus's parity with the Angel of Yahweh in the Old Testament(who also blesses, receives worship, doesn't give his name, is with but distinct from Yahweh, has Yahweh's Name which no one else can have, etc., see John 10, Jesus is not comparing himself to human rulers but to Spirit beings in Psalm 82. The author of Hebrews picks up on this: Jesus is way above angels.)
6) Makes sense of the New Covenant in which God forgives sins and writes His law on our hearts (Jeremiah 31:31-34 and again in Hebrews 8-11, also Joel 2:28-29 quoted in Acts 2. See also Romans 8 for how the Spirit enables us to keep God's righteous legal requirements).
7) Makes sense of baptism in the NAME (singular) of the Father, Son, and Holy Spirit (Matthew 28:18-20) and the disciples constant use of those three names as distinct but unified. There's a constant and simultaneous blurring yet distinction on the three persons (the Father and Son and in Acts, the Son and the Holy Spirit.)
8) It makes sense of both the Father and Son's insistence that while the Father is the "focus" person (the one who initiatives relationship with us) the Son provides the means of the relationship. "If you have the Son you have the Father too, if you don't have the Son you don't have the Father (John 14, John 15:9). The Father delights in the Son, if you delight in the Son then you've properly evaluated Him and the Father loves you because He loves the Son.
9) It makes sense of Creation: All things were made
by the Son and f
or the Son (Colossians 1:16). Creation is a gift of love from the Father to the Son, cooperatively created by the three-persons. As such, the universe has loving relationship, not power, as its core. That's really good news.
That's just the tip of the iceberg. Sadly most Christians are not taught the "why" of the Magnificent Three, let alone the "what". I hope that gives some helpful things to ponder.
Grace and Peace.