I bought a Strada DL 3 from roofbox, for a new car with a factory fitted towbar. And it sat squint. Roofbox asked me to try it on another car, and it still sat squint. So they took it back and sent a new one. Phoned me to tell me they’d checked it on their vehicle and it was fine. New one sat squint too, so I had the local garage get the car up on the ramp, and they were able to adjust the towbar subframe slightly. It’s less squint now, and Atera, via roofbox, have assured me its quite safe, so I’ll put up with it.
Guess only a bike rack would ever show up a slight less than vertical alignment of the towbar, you’d never notice towing something. Looks spot on by eye.