Nursing Student Help!!

I am close to being done with nursing school. I am an "older" nursing school student. I am a good student, got into the nursing program through the accelerated academics program. I tell you all this not to brag, but to give a clear picture. I have worked hard to get where I'm at. However, I'm so close to being done, and with every quarter since I entered nursing school I am developing a bitterness for the professors who have taught me. I have been told by every single instructor that I need to relax. I don't need to get A's anymore, that in the nursing program C means continue. (We have a more rigid grading standard) I wouldn't be so bothered by this, had the other people who got in the program like I did, hadn't been told the same thing. I have had professors laugh with staff nurses at the hospital when I didn't know the answer to a med question recall. I have been told to "hurry up" at med recall because they were running behind. I have been told when I ask a question to go look it up, even if I already had and still didn't understand.These are just a few examples. I spend hours studying and preparing. I feel as if I have spent thousands of dollars to mostly teach myself, and to be in a constant state of anger and irritation. I have worked with nurses for over 20 years and have never met nurses like my professors. I like them as people, but as instructors it has been a terribly disappointing and frustrating experience. I was so excited about nursing school. I have such a love of the profession itself, but all I want to do is finish, get out of that school, and then go back and tell them what a terrible experience nursing school was for me. I have always enjoyed learning and trying new things, but I feel as if that has been sucked out of me. I don't like learning under them. I've had good teachers in my lifetime. They encouraged, taught, never belittled, and I never dreaded asking a question. My experience has been the complete opposite in this program. I don't know how to handle this. I still have 2 quarters left and would like for them to be better. I just don't get how I can have good grades and such a terrible attitude. Am I just exhausted and burnt out with school? Help!