You can feel free to vent (I do too from time to time!) but pretty much everything is "allowable" as a resident. Sharing my own experience, I felt lucky at doing an outpatient substance use treatment rotation at the VA as a PGY-1, but I was still expected to take "short" call and provide weekend coverage with the other residents on the inpatient VA unit. Our PGY-3 year we do pretty much only outpatient, but still have a handful of weekend calls over the year.
Speak with your fellow residents and see what they think, but my advice is to have a better reason than "shouldn't this rotation count as an outpatient experience" but rather explain why it might be better for the program to have the time off so you can study for Step 3 or PRITE (even that is not a particularly compelling reason). Ultimately, each program is unique in what you'll be able to change (or "get away with"). I know mine is less friendly from that aspect, but I tell myself that "at least I'm learning" during that time. Good luck. 🙂