Solution for a bending Zaxis screw is a offset of the Zaxis motor. Nut, motor and optionally support with bearing on the top of the screw shall be in parallel with the Zaxis extrusion. Solution for that is a holder with offset for Zaxis motor.
I don´t like fixed offset holders which you can find on Thingiverse, so I created a holder with elliptical holes for motor. You can align you motor at any distance from minimum to 1.75mm.
Devil Design PET-G