Silver lining story. We have a fairly new machinery shed with roller doors (3.3m max height when open), but manually rolling them that high is a pain. One of the doors was very stiff and wouldn't lift properly, I think the builder's apprentice may have fitted it. Long story short, I drove the tractor into a door that was open enough for the skid steer (old habit opening the door, new tractor).
Roller doors are quite flexible, so it dented a bit, and pushed out of the tracks. To put it back meant loosening the tracks, readjusting the mounting brackets and axle on the main roll, etc. So, finally, two years after the shed was built, the door finally works smoothly and easily. And it now has a powered opener that takes it all the way without relying on my memory!
As I said, sometimes the glass is half full!