Why was napoleon unable to successfully established a french empire in europe?

After his naval defeat at the Battle of Trafalgar against the British, in which he lost his entire naval fleet, he decided to attempt to invade Russia. After this attempt to invade, he was defeated once more. After this, Napoleon was placed in home out of France so he could not rule over it. Napoleon escaped this home, and returned to Paris to continue his reign. Napoleon then tried to take control of more land in Europe where he was again defeated at the Battle of Waterloo where UK, Prussia, and the Netherlands all teamed up against the French. Napoleon was then taken to Saint Helena, an island off of the coast of Africa, where he later died.

He droped it over the bridge into the river