Water usage is probably my biggest. Living in a high desert, my wife and MIL see no problem with filling one side of the sink with hot soapy water to wash a few dishes because “that’s just how I’ve always done it”, to watering the grass and plants for hours. All of this makes me mental.
I mean, I’d argue that “Thank you” always implies acknowledging a social debt; if you don’t feel there was a social debt someone just assisted you with, I probably wouldn’t say, “Thank you.”
“Have a good day” would just as equally and politely close the interaction while not implying you were just assisted with a social debt.