What is the rudest thing a house guest did in your home?

My own personal story is not actually in my home but in my on campus apartment I shared with three other girls. My roommate, let’s call her Maryanne, always had people coming and going not surprising she’s always been more of a social butterfly than me and our other two roommates. There was this one in particular who made herself a little comfortable in our apartment. I honestly forget her name so let’s call her Myla. Myla would stay for days on end because of issues with her own roommate. Now we’ve had our own friends stay overnight. My friend practically lived at our apartment for a week when we had finals but even then she really didn’t do much and would buy things as well for the apartment as repayment such as food and toilet paper. Myla on the other hand would complain about the apartment. Which for someone who stays her 4/7 days a week would think you wouldn’t do that. And she would do it as insults to everyone but Maryanne on the way my roommate Nadine decorated the living room which me and my other roommates both agreed was fun and festive for the fall. That it was too hot in the apartment and that her dorm room was nothing like this. Finally the straw that broke the camels back. The food we had in the apartment which I bought out of pocket for the entire apartment to share and it wasn’t cheap food it was all healthy and good quality food. She looks over at the food cady we had and goes “why don’t you guys ever buy any good food?” And I look at her and say “you know you don’t have to eat or sleep here if you have a problem with everything you have your perfectly good dorm.” She just walked away. I don’t regret one moment calling her out like that.