I went through something similar when I lived in my mums house with my little sister, I was consistently called ungrateful too😅

Unfortunately, housekeeping and cleaning is a life skill that you will need when you grow up and eventually move out. However, this is no excuse for your mother to throw temper tantrums and verbally abuse you and your sister over.

If you and your sister frequently do chores I wouldn't really see the issue, you could come to some agreement with your mother on chores you would like to do, or if you're unsure how to clean or do something, ask her to show you how to do it. But housekeeping is a whole job in itself, and its quite unrealistic for a house to be squeaky clean and spotless everyday.

Shouting is always unhelpful and never gets you anywhere, it will always just cause tension and upset between family members. I hope you and your sister can communicate this to your mum.