Advice for free

Me to my 10-yr old son: How was tennis camp today?

He: I had a little problematic opponent this time. He was continuously complaining that I hit the ball too hard from both sides. 
So I told him:
‘Look, you don’t like my forehand, you don’t like my backhand…. but hey, there’s a solution here: ever thought of taking up some other racket-and-ball sports? You might love golf, for example..’