Why would you say he is unprepared? He has 90% of the basics.
So he only has a puny knife; he has a shelter, stove, cookpot, PLB,
clothing, water containers and purification as well as solid navigation.
He could have added more fire making, a better knife, some more first aid, a whistle and mirror without adding much weight but otherwise he is pretty well set up.
He had a decent amount of food although it was mostly energy bars with some rice beans and pasta.
I don't see much of an issue. What else is he missing?
Bill