This is a tournament and not a casual rd....in that case...IMO...it is bad form for an opponent to walk off early and head over to the next tee. This kid...likely a teen should still know better.
You're obviously upset enough to take the time to post about it...why didn't you say something to him?
You are a class A PGA professional and also a Director of Instruction.....not that one requires the 2 prior credentials to speak up....but the teen should be listening to what you or others have to say about ...IMO...a lack of tournament etiquette.
Medium bucket of balls
Went to work on hittibg the livin daylights out of the ball.
Started to get things back to normal after going thru a real horrible streak with the Driver. Planning on the same thing tomorrow