Nothing to do with queuing (though it is mentioned)Lots of kvetching... my take on it is people whining that they spent all night standing in line and didnt get to see all 50 characters.
I'm fine with them complaining.
Mainly the piddle-poor planning and organisation of the whole event. Again. A few from websites I wouldn't expect to hear such things from too.
When experienced and informed organisations start shouting you know something is wrong as opposed to a normal hasn't-a-clue day guest.