Its your money you pay the instructor not the other way around and if he is yelling at you in the cockpit he himself is the one that sucks because he's scared that you might get him into stall he cant get out of it. These r the types of instructors you need to stay away from. Ditch the low time instructor and get another one. And dont be scared to ask for another instructor. And like i said before its your money going down the drain when your not learning.