Think of it this way. You are given a pistol, put into a pitch black shooting range. A target is placed somewhere at the far end, and you have to hit it 12 times. You take a shot. There's a chance you might hit it, but odds are you aren't. Now, every time you miss, the target is moved. You don't know where you shot at, or where it is now. This is what grinding for the Atmas is like. Yes, some people will get lucky and finish it quickly, but most won't. Something as simple as a progress bar would have made this a lot easier to deal with because without a clear cut goal, you're just shooting in the dark.