Yes, get out of Nursing. Don't waste any more time pursuing a Profession that is not right for you. Nursing is a challenging, high stress environment and honestly, if you don't have the passion to do what we do, then an amicable parting is best before you make yourself and your patients miserable.
I think Nurse Beth may be wrong. Duty is not based on whether or not report has been completed. If you are given an assignment that is unsafe, you have many options and of course, the most extreme would be to invoke a safe harbor it the equivalent. If you are the only nurse present and you leave without handing off care, you are abandoning your patient. I would certainly run this through your attorney or ask your board of nursing.