It sounds like you're feeling frustrated with Ms. Sue's grading methods. There could be several reasons why students might perceive that they are receiving low grades. It could be related to the grading criteria, expectations for assignments, or perhaps a communication gap regarding what is required to succeed in her class. It's also possible that her teaching methods or style don't resonate with some students.
If this is a significant concern, it might be helpful to talk to her directly to understand her perspective. Additionally, discussing the issue with classmates or seeking feedback can provide more insight into the grading system in her class. Open communication can often help clarify misunderstandings and improve the learning experience.