Highbypass, RIGHT ON !, I hear you !
Nothing like a good bit of Instructor basing, usually from a highly experinced PPL, you know the type "Iv been flying for 34 years and have 325 hours, there's nothing you can tell me"
I have no doubt your Instructing ability is outstanding, your doing a good job, just all the other sh@t you have to put up with. Ensure you take your days off, don't take to heart all the negative stuff, in fact IGNORE IT, these guys will still be playing the same tune when your flying a jet, probley about then they will be telling the next poor Instructor what a great guy and outstanding teacher you were............, and of course all they did to help you out.