Why'd his star power drop so fast?

I know other actors' stars have crashed and burned pretty quickly, either due to a personal issue (ie Mel Gibson) or through a major bomb (ie Ben Affleck with Gigi)...but what happened to Patrick? He went from a string of hits culminating with ghost and point break and then made a small drama (city of joy)...and then nothing but the kind of stuff people get thrown at them when they're no longer stars, like father hood. So what killed him? It shouldn't have been city of joy, plenty of actors have those "small" dramas they put out from time to time and they aren't usually career killers.