I didnt see it as a tantrum, he didnt storm off really, he did shake the hand of everyone involved and wandered off the course, he actually looked reasonably relaxed in my opinion.
So were blaming the clubs again for his poor form and tantrum induced walking off the course. Good one!
Or perhaps the über talented multi millionaire brat should spend more time on the range and put his swing and head in the right place!
His clubs aren't inferior for purpose it's the way he's swinging them.