Over hyped, false promises from dev team, lack of understanding of what actual testing of game elements entails all the way from beta till now and most likely onward.
Leased graphics engine that because they didn't produce cant take full advantage of.
The worst CS in history
Wow copy that failed
Overused voice acting that most people space bared through because the stories were boring and lack depth.
Puppets
and last but not least
Bait and switch pros