Why Is There So Much Mystery Surrounding His Career Decline?
I mean where's the mystery?
He became famous as a tall, boyishly handsome actor and now he's middle-aged and no longer as handsome. Actors and actresses fall off all the time; especially those famous for their looks.
Granted Fraser was a solid actor but still; actors have a shelf life. It takes connections and a bit of luck to stay in the game after the looks have faded.