Sure, Charlie Sheen was a big star at the height of his career. And sure, he made a hit out of the show Two and a Half Men. But when you have that much fame, piss it all away on drugs and booze, and then try to keep the star thing going, you have to, at some point say "Hey, that guy's 15 minutes are up."
Such is the case with Charlie Sheen. He tried to keep it going even after losing his wife, his kids and his job, to no avail. Home movies of a couple of porn actresses chugging chocolate milk while you go around waving machetes in the air like a madman can only carry you so far before your fans say, "That's it, I'm switching over to The Bachelor."