I really hope the Biblical interpretation of "God" is inaccurate since he has drowned and burned ppl for their sins while Satan and his demons still roam the Earth according to scripture.You should not believe everything that is in those books as a believer. As you mentioned, some of the tings are obviously contradicting. In my opinion, Jesus tried to correct some of the teachings, because the description of God in religious books does not really make sense and a lot of people claim that they spoke for God that did not speak for God. I am not necessarily talking about prophets but more about those that have written those religious books. But I am also not sure about some of the "prophets".
There is a story about Jesus in the bible how he talked to Satan and tried to convince him to give in to his materialistic side, but Jesus resisted.
I believe they did the same with all the other spiritual figures and also the scribes of religious books with more or less success and they were more susceptible than Jesus.
Slavery is for example not a law of God although some people had slaves like Abrahams wife or Mohammed the guy that wrote the Quran. Slavery is one of the worst thing you can do that is why the negative principle tried to convince nearly every culture to practice it. Slavery was practiced nearly everywhere but that is not a human invention in my opinion. It is brought from negative beings similar that some human teachings were brought from positive beings like God.
Yes some stories were provenI know a lot of astral travelers that also met Angels, so I think they really exist.
But I think that is the same with channeling. Some people really had contact with God and with positive beings and some peopel didnt have contact. As far as I know God will interfere again because the result were not reallly satisfying, but you have to pray correctly to get help.
If you dont ask for help, God will not help you.
There are many examples of Favoritism within' the Bible. Satan himself is an example of someone who seem to get away with a lot of shit. Religious ppl in some parts of the world believe God orders them to put certain individuals to death while Satan can freely run the world and promote all forms of debauchery according to scripture.