If God has always existed as a triune God, why didn't the great men of the Bible know this and why were they not required to worship Him as such?

Trinitarian Christians say that *God has **always** existed as Father, Son, and Holy Spiri*. And that the father created everything through the son. **Did Adam, Abraham, Isaac, Job, Noah, Moses, Jacob, Ishmael, David, worship God as a triune "person/God?**" When they prayed, did they understand that they were praying to a triune God? Which one of the three answered their prayers? If they did not kmow that the God they worshipped was a triune God, **why would the greatest of believing men not know the son and or the holy spirit....and not be required to worship the son and or the holy spirit (both of whom existed in that time AS GOD)...and yet for the rest of us, if we don’t worship or acknowledge the son or holy spirit, we go to hell?** This question is for Trinitarians. Secondly, **my inquiry is not focusing on Jesus (the man/Messiah), but on the preexisting son and holy spirit as they existed during the Old Testament period (in their divine essence/nature as part of the triune God)**