In the 5 churches where I have been a member since I became a Christian, the one commonality has been the inevitable grumbles that emerge from the congregation. Occasionally its legitimate, most often its casual and unthinking throw-away lines about something that doesn't sit well with a persons preferences, and occasionally it will blow up into a crisis over (perhaps) a real issue of concern.
The Bible says to do everything without grumbling, so when an occasional grumble (from myself included) comes along I usually think "Ok, not a good one, but then none of us are perfect".
What if the leadership grumbled out loud? Well, good leadership won't. But I sometimes wonder, as I sit in church and look around, what might the leadership grumble about if I was able to magically remove their spiritual grumble filter.
Perhaps we might hear things like one of the following, which draw on my experiences of 40 years of church participation (with my apologies for any over-generalizations, and I'm certainly not suggesting that any one of these are pertinent to you, the reader!):