I understand it's very important to you to believe the OT is fundamentally important to Christian practice, theology, eschatology. The OT is a source of constant ridicule on atheist websites.
The fact is, almost all christian theology, practice, belief, ethics, eschatology are based on the New Testament, and as viewed and evolved through a lens of Platonic and Aristotelian Greek philosophy. That's why Augustine and Aquinas are just a important to the Christian tradition as Peter, Mathew, and Luke.
I generally agree that most people prefer the NT to the OT.
Might want to check out the history of Christianity on this one: https://www.newadvent.org/cathen/09645c.htm