Even if he was "crazy" so what, he is brilliant. He was destined to become an entertainer, from his childhood. Good for him for becoming so successful. This just sounds like people who are jealous wanting to find some fault in him.
What's the definition of crazy anyway? People like too stereotype and if you ask me most times its all about their jealousy of the person they're stereotyping. Anyway I think Jim Carey is "smokin'" so just carry on and make your impact on the world!