Basically, 80% of the old testament was written during the exile period. The new testament was written about 80 years after Jesus. The old testament and the new testament are full of contradictions. on the other hand, scientifically, these books can not be authenticated. Let me give you an example:
Matthew 9:9 :"And as Jesus passed forth from thence, he saw a man, named Matthew, sitting at the receipt of custom: and he saith unto him, Follow me. And he arose, and followed him." .
Obviously, matthew did not write that. If matthew wrote that, the whole paragraph would have been arranged differently.
I don't really see a probelm with what the old testaments is all about when it comes to YHWH, and I don't even have a problem with whatever Jesus said in the new testament according to the unknown authors. But I do have a problem with Paul, and I will soon write a post about him.
Have a good day all