Simplify the following text for a Grade 12 native English-speaking person.
Original: In the first Immunity Challenge , the younger Ulong struggled as Jolanda insisted to take everything in the supply dump , leaving the elderly Koror ( who only took the flint ) with the lead and eventually win the challenge .
Simplified: In the first Immunity Challenge , the younger Ulong struggled because Jolanda wanted to take all the supplies , leaving the older Koror ( who only took the flint ) with the lead and eventually win the challenge .