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Billy if I recall correctly, you're an IAABO official, right?
Don't you guys practice getting with a partner on Ts before taking it to the table?

In addition to not getting procedures wrong, I think it helps get us away from the coach. And if they continue as in your sitch, now your partner gets to toss him.

As others have mentioned, I think your response may have fueled the fire.
When a team is getting smashed & coach wants to spout off at the end of the game, I generally go with "I hear you, coach" as opposed to "that's enough, coach." JMO