Some guy drove all the way here with a gas grill we had delivered, complaining the whole time he couldn't get it started and what a pain it was getting it into his truck. I literally hook a propane tank up to it, and then turn the knob to the little 🔥 symbol and hold it there for two seconds till it clicks and the burners ignite.
"Nobody told me to hold it there!"
"Well it works just like a gas stove sir."
dumbfounded look. "This is too complicated I want my money back."
There's also other things like people not being able to figure out where the exit is, despite it being right next to the entrance. Or when I point them to where the bathroom is they literally turn the opposite direction and sprint off that way.