Yes, we understand what you mean by top 30 but that is only relevant for undergraduate rankings. For particular graduate programs, these schools may not even be the top 50. One thing you have not yet told us is what field you want to study. All we know is that business is something you do not like. However, you would need to have an Bachelor’s degree in physics or astronomy to be able to enter an astronomy program. Requirements for archeology are different still. Your GPA might not be a huge problem if there is a severe grade deflation in your university, your letters of recommendation could point that out and the right program would make allowances for low grades.
The real issue is that you need to apply to a program for which you are qualified, not just any arbitrary discipline…