Sorry that this experience was awful. I'm a medsurg nurse. I recall working in a similar environment. Working in CSICU was difficult. Especially with the preceptors I had. All except for one had A-Type personalities and very harsh. I couldn't put up with them. Very non-supportive with ice cold hearts.
Anyway, I've been traveling for 1.5 years in med-surg. Every facility has their own way of managing charts, staff, patient care, protocols. No facility is perfect. They all have quirks. The last place, a small community hospital, I had some troubles with. It was mentioned a few posts ago on the General Forum. Brief: That hospital should not carry incompetent supervisors to act as doctors or over-ride doctor's orders after the doctor had evaluated patient. The supervisor had no reason to yell at me!! for a fresh postop patient that had a new onset of afib and needed to transfer to a monitored unit!
Well at this same facility, starting out was painful. A nurse had too much to do here with little or no assist. We did vitals, fingersticks & bed baths (orthopedic, so many completes). I had a nervous breakdown the first day. The nurse manager was supportive and said give it one more week, if you still don't like it, then you can quit. I got through the first week and stayed after I was able to create a doable routine. Computer documentation and checking computer orders was soooo time consuming. In addition, for the many docs that did not enter electronic orders, we also had to do paper chart checks since the admission date of each patient (we commonly had 7-8 patients with an additional admission or transfer by the end of shift). Keeping track of both paper and electronic was confusing.
I had a clinical liason that worked with my agency. I called her almost every week or so with a list of questions on patient care, staff, questionable situations. She gave me a lot of support and direction. I think I would have quit if I had no one to talk to.
Try reposting in the general forum and/or the cardiac forum for the clinical questions. I think they can be answered quicker there.