Could you clarify what you mean by 'attitude problems'?
I assume something like 'unwillingness to learn new things and admit mistakes, etc' but I'd like to know an employers point of view.
Sure. It was a sense of arrogance and inflated ego more than anything else. Just because you went through ten weeks of boot camp doesn't mean that you're a master at your craft. Huge mistakes were made left and right without any sense of responsibility, accountability, or willingness to learn from one's mistakes.