What is the mistakes of Napoleon?

The unenforceable Continental System.

The Spanish invasion that tied down an Army in Spain to fight irregulars.

The lack of a first rate Navy that could compete with the Royal Navy.

The loss of the Slave Revolt in Haiti.

Not consulting with a weatherman before invading Russia.

Reliance on muskets instead of the slower firing but morer accurate and longer range rifle.

Attacking at Waterloo with a poorly trained Army.