He's an unmotivated, pompous assclown.
When he was fired, he was billed as the hottest coach on the market and then went on to be turned down for every single job. Never got another sniff. Another clueless assclown in Brian Billick hired him and found him so lazy, so uninspired, so incompetent that he had to fire him.
When Brian Billick thinks you suck as a coach, then you really suck because no one sucks more than the colossally incompetent Brian Billick. Except Dick Jauron, but that's a given.