It is a tough journey and i hate to see anyone discouraged but you will get through it. And that is weird if you were scoring between 60-76% on Qbank. That usually means youre well on your way to pass.
Some nurses are just that way, our instructors told us they "eat their young" and told us to expect it so i went in to clinicals expecting it. But i told myself i would never be that nurse and to always help students.