How can I get good grades in university?
How do you get straight A's in university?
How hard is it to get a 4.0 GPA?
In order to achieve a GPA of 4.0, a student must get straight A's their entire college career, in every class. Even if you got an A- in all of your classes, that would drop your GPA down to a 3.7. If you want the perfect grades in college, it is achievable, but it is incredibly difficult.
Related Question how to get good grades in university
Why do I get bad grades even when I study?
This probably means your study habit or style isn't working for you. Besides, it's not “studying a lot” that usually leads to good grades, it's “studying smart”. You should try to see what study habits work for you.