Empty Confidence
One of the clearest reasons why the Raiders fired McDaniels is because of his empty confidence. He continually insisted the team was getting better and showing signs of going in the right direction. However, reality painted a different picture and began to irritate Mark Davis.

Finally, he left the owner no choice even though it was long overdue in the minds of their fans. We’ve spoken already about McDaniels’ ludicrous contract as well as the money they poured into free-agent signings and extensions. In the end, they lost all confidence in McDaniels’ empty sense of confidence (via NBC Sports).