Why is the 82 so unreliable at night?

I know someone is going to say this is only because of the storm but this was common for me before the storm. About a month ago I took a 4.5 mile trip to a grocery store. It was a 14 minute walk each way to the stop, and a 4 minute walk each way to the store. I spent ten minutes in the store. The entire trip took 3.5 hours. The only bus I took was the 82.

During the day, even during rush hour, I rarely encounter busses more than 20 minutes late on route 82. But at night I almost never encounter a bus that's on time. I honestly don't know why the 82 becomes so unreliable at night.