This is going to sound harsh, but I don't take food advice from doctors or trainers because I've gotten crappy advice from both. I use a trainer for workouts and to motivate me to workout harder than I would alone, not to shame me for eating "wrong". If I want a diet plan and accountability for how I'm eating, I'll see a registered dietician.
That said, no one can motivate me to eat what I should eat other than myself. I have to be accountable to me, just like each one of them has to be accountable to themselves. They know what they should be doing. Maybe it was a stressful week for a lot of them. Life happens and weight loss and eating healthy isn't always a priority.
I have a Bachelor's degree in Nutrition, I continue to read up on it, and I know what I need to do. Some days, I'm just not motivated to do it, and no one else can make me motivated.
I'd back off. Lashing out does nothing useful.
Live the life you've imagined! - Thoreau