Is it abnormal to miss or feel nostalgia towards a past situation that you hated at the time?

Don’t really care to elaborate on my exact circumstances, but I often find myself in this situation and I can’t help but think that it’s an unhealthy way to be feeling. It’s like some kind of twisted form of the “grass is always greener” saying – wanting to get out of a bad situation at the time, but inexplicably missing it down the road. Anyone else have a similar experience?