This has very little to do with expectations and more to do with inappropriateness. It is inappropriate for an attending to expect an MS-3 to see patients q15 min all day long for 12+ hours. It is inappropriate for an attending to expect the MS-3 to scribe by doing most/all of the notes on those q15 min patients. It is inappropriate for an attending to pimp out the med student to scribe for the other attendings. It doesn't matter if it's surgery, FM, peds, psych, OB, or anything else. It's just plain inappropriate. A student's job is to learn. That's it. You don't learn by seeing patients so quickly that you don't get to ask history and actually learn what's going on. You don't learn by cranking out pointless notes because you don't have time to actually digest and research the information you're writing. This is a terrible rotation and I wouldn't hesitate to call the attending out on your eval.
You actually learn quite a bit by seeing patients in primary care. Repetition is very valuable. On top of that, I don't think you are completely characterizing what OP has described to us.
This attending was on a regular basis providing the OP with articles, readings, discussing topics and even working with them to get a research experience (case study) out of it. Were they doing lots of hours and writing a lot of notes, yes, but when OP actually talked to them about not having time for things, the attending was actually receptive to that.
The inherent problem is an issue of expectation mismatch and bad timing. The OP had already gone through 2 blocks of long hour inpatient IM rotations, and this was meant to be a break so they could spend more time studying for the shelf. Instead it was a much busier rotation, that didn't give OP the time needed to study.
One of my best and earliest rotations in med school was a primary care rotation that was busy, involved seeing a lot of patients, reading a lot of articles, exposure to different clinical staff, and writing a bunch of notes. While in it, it was rough, and I was also anxious about the shelf. I ended up opting to postpone my shelf, and it actually took a lot of the pressure off and I learned a ton in the rotation. Later rotations were easier, I was clearly ahead of peers when it came to my comfort level seeing patients and writing notes. Studying for and taking the PE (CS equivalent) was a cake walk. The main preceptor also ended up writing one of my stronger LORs for residency. Overall it was actually a great experience despite the work and not knowing it at the time. Perhaps that shapes my judgement a bit, but I'm sure abusive experiences have colored some of the other responses on this thread as well.
I generally agree that there are abusive situations in med school (and residency for that matter) where you do end up doing a lot of busy work with limited learning. I also hate when people say, well I was abused so you should be too. It's pointless. That said, I would take a rotation working 65 hrs a week with weekends off actually seeing patients, being taught, and writing notes over shadowing for 50 hrs a week and getting almost nothing out of it.
Ideally OP would have had this rotation after their shelf, they would have been able to freely absorb the material without the stress of the shelf hanging over them, learn from the cases, write up the case reports, etc. Unfortunately, we can't always choose when we have what rotation. In this scenario, the best thing would have been to communicate with the attending and explain the situation with the shelf. I've also had to do this before in a similar situation (adjusting schedule for the sake of shelf studying), and usually it's received well enough by attendings.
I hope that the variety of responses and experiences expressed in this thread help OP and other med students in the future.