It's technically Star Wars, but my gut tells me Star Trek is the worst one. At least in Star Wars you know that shit looks and is unsafe. In Star Trek you could be sitting down at a terminal having a nice day then the ship hits the space equivalent of a speed bump, the terminal blows up in your face, parts of the ceiling come down, the room catches fire, and the fire suppression system only ever works for comedic effect. Oh, and there is a decent chance the doors won't open in an emergency and you have to hope you can pry them open with your bare hands with your face and eyes full of blood before the fire cooks you, takes all the oxygen, or the smoke gets you.
At least Star Wars lets you know you are in a death trap, Star Trek, at least the Federation parts of it, will lull you into a false sense of security with all those creature comforts and lip service to safety.