Why Was the Library of Alexandria Actually Destroyed?

Everyone thinks a big fire destroyed the famous Library of Alexandria all at once. It was more like an old building that got sick and died over time. Imagine a giant bookhouse by the sea. One day, a general named Caesar started a battle, and some ships caught fire. The wind blew the flames to the library, burning many scrolls. But it didn't die then! For hundreds of years, people argued about it. Some say emperors neglected it. Others think angry religious groups smashed it because they didn't like its old gods. So, it was not one big event, but a long story of slow loss.