Congress didn't provide the army with enough equipment because:
it didn't want a war
it wanted foreign countries to give aid
a soldier's life is expected to be hard
it didn't have enough money
the continental army was a volunteer army

It didn't have enough money. We were part of England before the revolutionary war but then we decided we wanted to be separate, so thats when the revolutionary war started. The U.S. (colonies) were practically a bunch of rebels with barely any money that wanted freedom from the royal nation.