My company's lowest level HR position (coordinator) was a job that I held for 3 years (I've been promoted since). In that time, we've had 6 people leave, citing that the job is too hard/annoying. I stayed so long because I honestly didn't mind doing the work once I became good at it, but people keep jumping ship after 3-6 months.
I'm not the supervisor of this position and I have no authority to decide what the job description entails. However, since I'm the only person who has stuck around for this long, it has been my responsibility to train every newcomer.
It's basic entry level HR stuff like posting jobs, handling onboarding, data entry, and handling walk-ins and a shared inbox. The problem is all of the random nuances that are hard to train for. The SOP accounts for XYZ, but sometimes WXY happens instead, and it's unpredictable. The other issue is that this position deals with having to nag adults to do paperwork. It's hard to find anybody who enjoys that.
I know what you're thinking. It probably doesn't pay very much, right? Right. It doesn't. But again, I have no control over that either.
I guess I will just be perpetually training new people and dealing with how visibly jaded they become after only a few weeks as they slowly realize that being in HR is not all about helping people.
/Rant