1) YHWH is never referred to by name in the NT .. and not the only God referred to as "Almighty God" in the OT - as per your quote "I did not make myself known"
So a puzzle .. If it was not God YHWH that Abraham knew - what was the name by which Abe and the Canaanite Priest King of Jerusalem - Melchi-Zedek knew "God Most High" to what God where these men giving Praise.
2) 3}
First -- YHWH states he is jealous of other Gods .. in fact .. in one place states that his name is Jealousy.. one of the many strange things about this God .. with the most petty and nasty of human characteristics.
Second .. Your Quote from Psalm 82 is just horrible .. an intentional mistranslation .. YHWH is standing in the Council of EL .. EL being the fellow being worshiped in part 1.
God stands in[b] the assembly of El;[c] in the midst of the gods[d] he renders judgment.
Psalm 82 - A psalm of Asaph. God stands in the assembly of El; in the midst of the gods he renders judgment. He says, “How long will you make unjust legal decisions and show favoritism to the wicked? (Selah) Defend the cause of the poor and the fatherless. Vindicate the oppressed and suffering...
www.biblegateway.com
This Most High of God is mentioned a few times by name in the OT.
Now as for the divine nature of Jesus .. remember our friend Melchi-Zedek .. the Canaanite Priest King .. worshiping EL -- the High God of the Canaanite Pantheon.
Jesus .. according to the book of Hebrews .. is a Priest forever of the order of Melchi-Zedek. A Priest of EL
and now you know "The rest of the Story"
Har har har