I'd suggest using a very simple object for testing, such as the 0.5mm-thin-wall
from The Essential Calibration set
on Thingiverse. This is meant to be a printed with 1 perimeter and 0 infill.
Anyone prints that object and demonstrates the leaning, and then can share the gcode, it would be useful. If that one doesn't do it, then the 50mm-tower
from the same calibration set would be another good choice. This object is a solid so uses infill.