The Quran was revealed verbally by Allah to Prophet Muhammad through the angel Jibreel(Gabriel) over 23 years, starting when the Prophet was 40.
Prophet Muhammad encouraged his companions to memorize as much as possible and would call his scribe (Zayd bn Thabit) to dictate to
He died a muslim and hell is not an eternal resting place for muslims.
Your posts mean nothing.
May Allah forgive him, widen his grave and put him in jannah.