First, three different preceptors = unacceptable.
In our program there is a three week classroom orientation then a four week clinical preceptorship (and additional shifts if needed).
Our new grads take a full patient load Day #1 but with the preceptor holding their hand as they go. The preceptor guides, mentors, coaches, assists and helps introduce our new nurses to the world of real life nursing and into our culture. As the manager, I meet with them formally on a weekly basis with our Clinical Nurse Specialist/Educator. I go in early daily, especially if I have night orientees, I want them to know who their manager is, just as the day orientees get to see me daily.
Good Luck to you.