The Quran is full of nightmare verses. The one that sticks out more than most to me is: (Quran 4:82)
It reads as follows:
Do they not then reflect on the Quran? Had it been from anyone other than Allah, they would have certainly found in it many contradictions.
(Many) contradictions?
Allah, the all knowing and seeing God, contradicting himself?
Shouldn't of it said; They would of found in it contradictions?
The "many" part is the error. I'm not the sharpest tool in the shed, but seems pretty obvious to me.
Another Muslim dilemma in this verse.
Let's just say, it did say what it should of said. It leaves another problem!
Mohammad saying that the Quran has no contradictions to prove its divine inspiration, is in itself problematic.
If I was to write a book and say:
My is book is divinely inspired because it has no contradictions, I would probably get laughed at. There are many books out there with no contradictions. It really is a silly argument from Mohammad (or Allah.)
As you can see, there is no way the Quran is from God, and Mohammad was certainly a false prophet.
To rub more salt in the wounds, there are loads of contradictions. It's full of them. Here is a whole host of them:
https://www.answering-islam.org/Quran/Contra/#internal
God bless.