Speaking as a newbie (26 finds--0 hides), I would never complain about a cache, at least not yet. I just assume that the hider knows a whole lot more than me, therefore the error is mine, not his, on a DNF. I have searched for some caches on 3 seperate occasions, finally to find them. When I DNF, I go home and think about the spot, revisit the logs, and think some more.
I am still not quite ready for my first hide, but I am looking at spots in my area. I want to make it a good one, with something good for FTF.
I love caching and I want everyone else to love it also.