Young boys are seen in worn underwear

One boy's buttocks are briefly seen.

A man's body is seen sinking into water with blood coming out from his mouth.

A pig is shown torn open with its organs spread out on the beach. Two boys are shown covered in its blood and eating it.

A decapitated pig's head is shown on a stick multiple times. The decapitation occurs entirely offscreen.

A boy is stabbed to death by a group of boys. All that is seen is the boys stabbing at something. The dead boy is seen afterwards.

A boulder falls on a boy's head and cracks his skull onscreen. You see blood on and around his head and part of his skull.

A boy is beaten and whipped by a group of boys.

A few uses each of "fatass", "shit", "bullshit", "goddamn", and "fucking"

lots of mild language, plus 5 F-words, all said by young boys.

None.

A storm tears through the island, causing a lot of destruction.

Jack's character comes off very sociopathic and sadistic.

The idea of being stranded on an island itself can be very unsettling to some.