i think yes..in someway you are a bit selfish and inconsiderate.

CNY is like that for a lot of family. At least for those families that I know. During which, the whole bunch of families will come back to the parent's house. Things will certainly be messy. During my time when I go back to my grandparent's house, it will be dirty like crazy. But the grandparents side of the family will not complain and just tidy whenever they can. Just need to bear with this. Only like 1 week only.

One of the solution is you shift out and live on your own. Then the responsibility of the house will not fall on your "that much" anymore. However, since you are the daughter in law, you have the obligation to the house. If there are other daughter in laws, you guys just need to work together. It's all about being in the family. That's how Chinese families are brought up.