Spoiled kids??? am i being too judgemental?

so right now i am renting th suite from my friend her kids and her live upstairs. boy 21 girl 15. The girl not so much but today the boy when he was geting his lunch ready for work he is like oh did you forget my lemonade at the store. I thought oh no did I leave it at the store i looked in my car and in my suite and then i went upstairs and looked in the cupboard there is was. And get this, because it wasnt in the fridge he didnt look anywhere else. I feel intense desire to kick his ***. I dont know if it is because i grew up with neglectful parents and I felt lucky to have lemonade in the house (of course that doesnt make them neglectful but a whole nother story) i grew up fending for myself. It boggles my mind that he didnt even look. If that had been me at that age I would have been screamed at. Some of the things about him he is just a whining kid sometimes and he always points out everyone else's faults but i wonder if holds himself to those standards. I bought some lemonade until friday is pay day for her.