Atheist who is having a crisis of faith

[downbeatplumb]

Yes but 3,000 years worth of research we have manuscripts more than any literature in history well over 10,000 and they all say the same thing for the most part,

The gospels we have today are the result of the council of Nicea that decided what the truth was going to be. It happened at 300 AD and expunged a lot of gospels that ran counter to the narrative that came to be the new testament.
So that they are similar is because the similar ones were picked because they were similar.

with some obvious little differences, if it was really made up wouldn't they of been changing it each time instead of just copying from one to another verbatim?

Verbatim is an interesting choice because the different versions of the bible are not word for word or "verbatim" copies. But kinda say similar things.
Look it up.

if the christians were reajlly liars as u claim then why wouldn't they add stuff to make it even more believable instead of just leaving t he OT and NT the same all these years?

And again there is a long history of the clergy and wider church doing just that. They even added fake references to historical works to make jesus seem more plausible.
You have mentioned Josephus whose mentioning of jesus is rearded as rather a crude forgery.

https://www.richardcarrier.info/archives/7437

Why wouldn't each reader just start changing stuff if it was just made up by everybody? Or were there certain writers? Why wasn't it changed?

It was.

https://av1611.com/kjbp/charts/various.html