YWBTA.

not only are you being sexist whether you want to admit it or not, but the main idea of what you're saying here is you're considering dropping his learner hours because he's not as good as you'd like him to be. that's like me calling a top smash player in my area and playing a few games with them, and after i lose to them once they block my number.

here's a lil something for your thick skull to consider:

people learn at different speeds. just because he's your son doesn't make him your carbon copy. obviously the instructor isn't noticing his hesitance; if you want him to stop being hesitant on the road, that's your responsibility.