Redesign the rocket so that the 1000t payload doesn't have to be used at all before you get to orbit, then it will be legitimate.
Tip: I think you were going up from the launchpad too slow, wasting fuel on combating gravity.
Try to reach over 100m/s by the time you reach 1300m high. If you go faster and turn more, maybe you won't need as much fuel to get to orbit.