You hit the nail on the head.
One thing that I think added to Coach Saban's ire was that 30 seconds before kickoff (literally) she asked him who the starting QB was going to be. I had missed seeing this until watching the replay. I think that was the impetus for why he said "QUIT ASKING!"
But that notwithstanding, Coach apologized hours after the game. So why is this a story a week later? Goes back to my point about his reaction is exactly why the question was asked.