They need to communicate better. If your dd isn’t interested in throw pillows or decorating the lounge, she needs to make that clear that it is on the roommate to do and pay for that decorating. Who is taking home the items that were jointly bought and none consumable? When my dd moved into an apartment with 2 friends, they had a group message going on facebook as to what they needed for the apartment and who had what. One had a vacuum, mine had skillets and pots, another had dishes and bakeware. The only thing the bought together was the kitchen garbage can. At the end of the year they took home what they had purchased and the garbage can went with the other two since they were going to be getting married. I lived the closest and the grocery stores were not the greatest there, so I would get the list of what was needed. I bought and froze ground beef, but another roommates parents bought them boxes of frozen chicken breasts. When they needed a rug for the front door during the winter, I found one on clearance and we brought it home at the end of the year. I got pasta’s cheap so they shared. We hit a deal on hot dogs (50 cents a package) which only the other two ate, so they paid dd and froze them. Two drank one type of milk and the other another, so two split milk and one bought their own. Basically they had well balanced meals, and only bought perishables. At the way things are going, it is probably best that they buy their own food and basically put a line down the middle of the fridge. They should also have one designated area that is shared such as food that they can’t finish and will be going bad soon, so that only items in that area (even shared cookware) can be used without issue, any place else, it’s hands off.