You need to stop blaming the game for your shortcomings, then you might improve.
But to the question: Calibration is all the same, although planes are different. Make sure climb rate reads 0, check your altitude and speed after you calibrate and if you calibrate too early, be aware it can fall out of calibration. As Karnak said, open those bomb bay doors early and calibrate after the effect on your speed has taken place.
It is not the game's fault.