As for the DM Trainee... I hardly think one classroom session qualifies me to be a DM Candidate on a dive. Enrolled in the class? yes..... qualified to work with students in the water.... HELL NO.
Puppy... have you ever heard the adage "Living well is the best revenge"?
Time to move on, no?
Perhaps when you have as many dives in your logbook as you do posts in this thread you'll be closer to being qualified to be a DM candidate on a dive?