Plot hole: The robot pilots have no screens/monitors in the robots to show them what's outside - only some obviously unimportant text or graphics. How could they fight the monsters without being able to see what's in front of them (or anywhere else, for that matter)?
Plot hole: When the robot pilots first connect after the first attack, Red tells the story of his battle. They don't seem to even notice the dozen or so civilian bodies they have to actually physically step over - and the bodies are just lying there along the sidewalk & parking lot; no signs of any monster attack, so how did they die?
