I think you and I have similar thought processes and somewhat similar paths with being former christians.
To me, it comes down to looking at the claims, examining the historicity of the claims and then examining the evidence in the real world as to the probability these claims can be true.
When I engaged in the above at an in depth level with christianity, I simply could not reconcile the story with reality. Would a loving God send his son to save mankind and then only expose him to small parts of the population? No, I don't think he would put so many at a disadvantage, if he was an all loving God about all his creation. Would an all loving God allow man to suffer on earth for a minimum of 100,000 years before sending a savior to save mankind? No, I don't think he would. Would an all loving God allow people to dump their sins on one man no matter how severe and still allow them to experience eternal paradise, all while those who don't believe, but live a caring life, are doomed? No, I don't think an all loving God would do such a thing. Would an all loving God allow millions of children to die an agonizing death each year? No, I don't believe he would. The problem with the credibility of the NT go quite deep and just add more fuel to the fire of the story not being one I can reconcile.
So, the God of the bible is the least probable truth IMO. A universal non-personal God has a better probability of existence, but still unlikely IMO. The existence of no God is the most probable IMO, according to the available evidence and realities of the world we live in.
You are looking at God from your point of view, the mind of a man. Of course you are not going to understand God.
Teachings of other men, are they 100 percent true? Or do they claim to be 100 percent true? No, men lead men astray. God gave us the Bible to know what is 100 percent true. God does not lead men astray.
The most important thing about the Bible is WHAT is written in it. Yes we discrepancies, questions, thoughts about who wrote each book. But does that really matter as long as God through His DIRECT révélations through men, got everything He said written down correctly?
Jesus wrote this in the last Book of Révélations 1:1-3:
" The revelation from Jesus Christ, which God gave him to show his servants what must soon take place. He made it known by sending his angel to his servant John, 2 who testifies to everything he sawthat is, the word of God and the testimony of Jesus Christ. 3 Blessed is the one who reads aloud the words of this prophecy, and blessed are those who hear it and take to heart what is written in it, because the time is near."
The LAST book in the Bible, REVELATION was the LAST time that God would speak to men directly to write down what He said. God stopped this after Jesus, His Son.
NO OTHER book written after Révélations is a direct revelation from God.
People who stoned Jesus and crucified Him on the Cross didn't believe He was the Messiah. So what difference would it have made if Jesus walked all the way around the world? People who were with Him, didn't believe.
No man is without excuse, to lay down their life for Jesus, just as He did for all mankind. Jesus is the most holy and loving God, why would someone not want to choose His way?
(I know the answer)