Not that old chestnut. Now you are scraping the barrel for reason to hate the guy.
Some of the greatest coaches ever show nothing on the side lines. In fact, I'd argue, that very few of the best are in the "scream and yell" category. My favourtite example is Bill Belichick at the New England Patriots. Whether you love them our hate them, the guy is coaching genius with an ourstanding track record, but look at him during a game (even in the Superbowl), and you don't get a flicker of emotion from the guy.
I'd also question any professional who needs to be yelled at by the gaffer to produce a performance. My boss doesn't need to come and yell in my face every day to get to do my job.