Charlie Sheen is "extremely disappointed" with the new season of Two And A Half Men, insisting he's not surprised ratings are tumbling.

Sheen was fired from the hit sitcom earlier this year (11) after publicly falling out with show creator Chuck Lorre, and Ashton Kutcher was hired to take his place.

Kutcher made his debut on the show last month (19Sep11), drawing in a record-breaking 28.7 million viewers. But, after the show's season premiere, ratings began to drop and Sheen insists he predicted such a decline, telling TMZ.com, "Well you know, people (viewers) aren't stupid."

And although Sheen is moving on with his own career, he admits its hard to sit back and watch his legacy tarnished as the season progresses. He adds, "I'm extremely disappointed with how they're (show bosses) handling what I left behind."