Nothing I do is good enough for my mom

I can never fully please her and have her be proud of me, there’s always a catch or something that I can do better. I am studying for university exam. I study at least 4 hours a day and I'm not going out. I spent my whole year studying. I can't study right now because my mom always told me that I didn't study enough. One day I studied for 10 hours, except for school and my mother told me that my sisters were studying until the morning. My psyche was turned upside down. I have an exam in 1 week and I think I can't win when I take it. I feel like no one in my family supports me.