My goodness I know exactly how you feel and I know it hurts deep down. All I can say is encourage yourself and hold on to your faith. I know what's like when you ask for feedback and help all to be criticized. I know how it feels when you have so much responsibilities and don't quite understand the ins and outs of the job description. My Dear, you will make it. The floor seems like a toxic environment and once it it the culture of the floor, you will always be picked on. You will continue to feel inadequate because of all the criticism. If you don't feel it is a right fit for you, start applying for another job. Please don't give up on nursing. Hugs to you.