I had a shared pipestem with one other neighbor. It was THE WORST. Fortunately, the HOA plowed the center part of the pipestem (it was like a T shape to our two garages). The other neighbors, on top of doing zero to take care of their home and property, were always blocking us, parking on the grass, generally just being a hot mess.
Long story short, we lasted as long as we could and finally moved. Fortunately, the new owners didn't investigate to deeply or they would have realized what they were going to have to live next to.