Perhaps you should read, "Never Tell me Never".
When I first started to fly, I was lucky to meet this person when she was teaching aerobatics. I didn't have the pleasure of being her student but the word around the school was she was a meticulos instructor.
Perhaps you will re-think your first comment after you read her little story.
Perhaps you should look if you have expired your used by date as an instructor and move on.
Cheers.....& Keep Cool