That it i a translation of a translation is indisputable, and if you’ve ever been to Babelfish, you know what happens to anything when you translate it again and again. Try putting any phrase in and having it translated, then translate it back to see what the system came up with.
If you ever played “Telephone” as a kid, you know what happens even in the same language as you pass a message from one person to another, then another, then another, and on down the line.
Furthermore, you must keep in mind that different writers were writing to different audiences, and they presented the story to fit that audience. Anyone who has written for publication or done any public speaking knows that you write or speak to your audience, and you would tell it differently to a different constituency.
Yes, there are contradictions. For example, in the Good Friday story, Matthew has Jesus saying one thing, John another. It’s possible that he could have said both, but either or both contradicts Mark’s account that Jesus was silent all the way through. He could not have been silent and said what Matthew had him saying or what John had him saying, and certainly not both.
Early transcripts show many differences. There are known additions and deletions by scribes, deliberately or accidentally, but this includes the deletion or insertion of entire stories. Additionally, there are transcribing errors, where a scribe had to decipher something that was unclear in the copy he was working from, and perhaps chose the wrong letter or word.
Further, Jesus spoke Aramaic. Aramaic words often have dual or triple meanings, and when they were written in Greek, the writer had to choose which meaning he believes to be the correct one. (The writers, being human, could be wrong.)
And most, if not all, of the books were not written by people who actually knew Jesus. They were oral tradition (as the Old Testament also was) which someone finally wrote down. But if you’ve ever told a story multiple times or heard someone do so, you know that stories change each time they’re told.
In early Christianity, there were many different beliefs. Eventually, the church leadership set down an orthodoxy in the form of the 27 books we know, primarily because those were the most popular ones. It doesn’t make the others invalid.
Some of the pre-orthodox traditions of Christianity are beginning to re-emerge today, and many Christians seem very disturbed by the re-emerging diversity of belief.
Having said that, today we have a "Feminist" Bible with God as a woman, and various other abominations that it's a pity a tree died for it. I'm sure the Ten Commandments will end up favoring abortion and sodomy and doom climate deniers to hell. Go back to the Hebrew and Greek and we will be fine.