I suppose to directly address the Op, there really aren't strange complaints or any more negativity than usual. The problem is that any and all dissent was herded into one thread for Civilization 5. For over 5 years, people were accustomed to a sheltered paradise where only positive thought and praise for the game was strictly enforced. Any criticisms and dissent were ruthlessly shouted out and stamped down.
I do hope for the health of the community that we won't see a repeat for Civ VI.