YANBU.
Another DP here who gaily stacks things up on the side. Today I had just cleaned down the kitchen surfaces (still had the cloth and spray in my hand) and he trotted in and put the dirty plates on it.
Me "can you put those in the machine please?"
Him "but there's still some lettuce on the top one"
Me "
so scrape them off and then put them in the machine"
Him
My general rule is that I will load, and he unloads, so I can understand why he might not have automatically put the plates in the machine, but I was clearly just finishing cleaning and he was next to the dishwasher. And he didn't unload it the last two times, so he owes me two loadings and unloadings.