First of all, we must master the essentials of the previous step. Don't lift your legs too high when you take off (too high will affect the strength of opening the longitudinal fork). When turning in the air at 180 degrees (of course, it should also be 180 degrees when it is not good), and then when turning to 360 degrees, our legs should be quickly retracted. Generally, the reason why we don't feel high when we take off is because our hands and legs don't exert force at the same time at the moment of take-off. Put the force away so that you can leave room for your legs when you turn around. This is just a technical conversation. The main thing is to have some bounce, explosiveness and flexibility. Judging from the height of your takeoff, there should be no problem. Look for reasons elsewhere.