You see the problem is is that you have been brought up a Muslim in an Islamic tradition where you have been told that the Qu'ran itself is a miracle and that you are forbidden to question its claims - namely that it is miraculous revelation.
As someone who has not had that pressure to conform I can see nothing miraculous in it, and as Gypsy said, the claims of unknowable scientific knowledge are just wrong - it is vague and previously known for a thousand years or so.
Your point about the prophet being illiterate is again spurious; most people were, nothing special in that... indeed he was a very successful trader who had traveled widely.....he was an intelligent man.

If you wish to believe, then fine, well done, no one here will try to force you to un-believe. But if you put up points for debate you will get counter arguments - as long as they remain respectful, that's fine to.
I do not come from a position of ignorance in these matters, if I believed in the assertions outlined in the website you linked to I would be a Muslim - but I don't so I am not, as are 80% of the world's population.

Peace

"Deaths in the Bible. God - 2,270,365
not including the victims of Noah's flood, Sodom and Gomorrah, or the
many plagues, famines, fiery serpents, etc because no specific numbers
were given. Satan - 10."