Oh Trubru. I have been there too. I just don't get it. Do these guys think we were born into the left seat? We all had to spend time, (me years) on the right learning from someone with the hours, experience and know all to run the show. Where do these dumbwits get their self-confidence from?
For me it is vitally important to be flying with a good guy who knows their place and does it well. Otherwise very quickly it will turn your job into a nightmare!
I have not found the answer to your question yet but I do sympathise with your predicament and would be very interested too in hearing others opinions on how to solve this, what seems to be an ever increasing problem.