To claim there is a "fix" and it's "easy" is laughable

The long tube (judging entirely from the appearance as pictured) has the OD of at least one end located outside the OD of the bend (in cross-section, the diameters don't even touch).
With the same bend, the resistance to buckling in compression can be substantially increased by simply increasing the tube diameter so that center of one is inside the diameter of the other.