Well, it's not true that no one is hitting crap--my first two sorties, I nailed both sets of targets I aimed at.
If you are missing, but still in line of flight, there may be an easy solution. One thing I've noticed from talking with a couple of people is that they are rushing the moment WHEN they calibrate. After you level, you have to wait until the plane is up to full speed (or whatever speed you are planning to bomb at). If you don't wait until your airspeed is steady, you will miss.
Don't know if that's the problem, but hope it helps.