I'd say the chronic understaffing and heavy workload that often goes hand in hand with working in a nursing home. Don't get me wrong, I love to work hard and rising to the occasion, but I don't like feeling like I can't keep up with the workload, which is how I felt sometimes in the nursing home especially if we were short-handed that shift. The worst part was the guilt I felt for not being able to give my residents the care they needed and deserved. However, I'm now working in an environment that doesn't have these problems and love it.
Also, some of the really rude, nasty and hostile co-workers I've encountered since starting this line of work. I realize difficult co-workers are everywhere, but it seems somehow worse as a CNA. I suppose due to the fact that this is a high-stress line of work, and some people don't know how to handle stress, so they take it out on others. I just do my best to try and not let people get to me, and do my job. You're there to do a job and take care of people, after all, not make friends. But it can be hard at times, especially in LTC where the job is so dependent on teamwork.