Show me one verse in all of canonical scripture where it says to pray to anyone besides YHWH the Father.
Now hang on just a minute - who says there is anything wrong with addressing prayers to God the Son or God the Holy Spirit?
We believe in one God in three persons, each of whom is fully divine and coequal. If you are suggesting that prayers addressed to Jesus are wrong, for example, the prayer “Lord Jesus Christ, Son of God, have mercy on me, a sinner,” this would be dramatically more objectionable than disagreeing with the intercession of the saints. It would seem to me to be a crypto-Arian, crypto-Pnuematomacchian position.
Indeed the problems include, but are not limited to:
1. YHWH is a name proper to God, not only to the person of the Father. Indeed Jesus Christ identifies Himself with this name when he says “Before Abraham was, I AM.” YHWH translated means “I AM THAT I AM”, and is how God identified Himself to Moses at the Burning Bush, but in that instance, we do not know which specific person Moses was speaking with (although based on what happened on Pentecost in the Cenacle, it seems probable the Holy Spirit was responsible for the burning bush, especially since it was not damaged, and is still alive to this day in the courtyard of the St. Catharine’s Monastery in Sinai.
2. No canonical Scripture could be interpreted as prohibiting prayer to any person of the Trinity.
3. On the contrary, appeals to our Lord in His incarnation, made during His ministry, are absolutely valid prayers, since Jesus Christ is fully God and fully Man, and is coeternal, consubstantial and coequal with the Father (and also consubstantial with us, this hypostatic union, which is the essential theology of the Council of Ephesus in 435 AD and the Council of Chalcedon in 451 AD, and even more essential to our salvation, for we are saved by the fact that in Jesus Christ, as St. Athanasius wrote in On The Incarnation, God became Man so that Man could become god” which is to say becoming by grace what Christ is by nature: resurrected, immortal and receiving eternal life.
4. Prayer is not worship, but Jesus Christ is to be worshipped, so to say we worship Him while only praying to His Father makes no sense at all.
5. Since the Father, Son and Holy Spirit are God, the First Commandment applies to all three persons. Furthermore, in some of the instances where Moses met God in person, it is self evident he was interacting with Christ, since God the Father is not incarnate, and according to Jesus Christ himself, no one has seen him at any time, except through the revelation of Him in the person of the Son, who is the incarnate Word of God.
6. Since the Son and Holy Spirit are God, praying to God without specifying the divine Person is a prayer to all three Persons, and so whether you realize it or not, you are excluding as illegitimate every prayer in the Bible except for the Lord’s Prayer, which alone is addressed specifically to God the Father.
Show me something clear and concise, that's not mostly based on conjecture and apocrypha.
Well firstly, 2 Maccabees is not apocrypha. I would not dream of quoting scripture not recognized as canon by all of the ancient apostolic churches.
Secondly, I don’t think this issue is of importance given that you have objections with people praying to God in the person of Jesus Christ or the Holy Spirit, or indeed to the Trinity as a whole.
I don’t think any Christians I know, even my friends such as
@MarkRohfrietsch who do not believe in intercessory prayers to the saints, for example, asking the Theotokos to intercede for us, would say that praying to God in any or all of His persons is wrong, since all three are God.