Macbeth's tragic flaw? Is it one or a combination?

Could you imagine robbing a bank with this guy? He would be the worst accompliss ever! He would be paranoid, whiny, scared and bi-polar. So what’s his tragic flaw? I think it is a combination of things. His idea of grandeur is one. Certainly the ladies in the play had something to do with precipitating this. The witches merely suggested random ideas that Macbeth liked. Low self -esteem is another factor. L. Macbeth bullied and emasculated her husband until he relented to kill Duncan and his mind completely unraveled. Macbeth’s unchecked ambition combined with the fact that he was inept at being evil added to his long list of shortcomings. Macbeth wanted to be King so when he choses to be nasty, unfortunately he is just bad at it. Filled with paranoia, he muddles his way through a series of dastardly deeds. Let’s face it, Macbeth just wasn’t cut out for a life of murder and mayhem.