Usopp is mostly portrayed as a weak and scared pirate . But there are instances where he stand out as a warrior with his bravery and shooting skills .
Dressrosa arc - It was in the Dressrosa arc where he saved the citizens of Dressrosa and many other pirates and warriors from being a toy for their entire life . It is the bravery shows at this instance that turned Usopp into the God Usopp .
He defeated an important figure on the enemy group without even lifting a finger. The girl with devil power got scared and lost consciousness .
Most of the people in Dressrosa who were transformed had no hope of turning back into humans from toys . God Usopp saved them all with his bravery . God Usopp did not give up and fought for the people he loved .
