In Iron Man 3, we've seen dozens of Iron Man suits, "House Party Protocol". In Avengers: Age of Ultron, he designed the "Ultron" project, which in turn led to the production of thousands of Ultron drones, almost as powerful as Iron Man suits.
He provided an armoured suit for War Machine, but not for the other Avengers.
He designed a special suit for Spiderman, but not for the others.
So Tony doesn't share his suits with others much, I understand.
A lot of suits and drones were blown apart in beautiful fireworks in the previous films, but it's easy for Tony to make a thousand more.
So why can't Tony bring in his army of drones/suits to help his team win in Captain America: Civil War?