He’s just doing his job

Or in my case on your first class he lets you drive in a roundabout with absolutely no instruction, you pray, you make it, he's annoyed that you can't do things he hasn't taught you yet, then you have to go away for 2 months for an internship and when you come back you notice his driving school has closed. You call, mail, wait, contact the relevant authorities of your town, manage to reach the guy but he hangs up... Hope I'll get my money back eventually, but it's already been one hell of a ride and it's not over.

Why specifically a divorced man

Driving lessons are paying a stranger to be their chauffeur and if they don’t like the ride you’re not allowed to drive your own car

Driving school is a reverse Uber. Pay first. Get into a strangers car. Drive him around for a month. Get 3 stars