It sounds like you're arguing for the title here. You say the job requires you to work at any hour, among other things. You say the lessons are at 6 in the morn

It sounds like you're arguing for the title here. You say the job requires you to work at any hour, among other things. You say the lessons are at 6 in the morning. You say 80% fail. Sure, it doesn't conclusively prove that people drop out because of those two things, but it seems likely.