limes11
"A colleague told me that OSM is crap because village of his parents is kind like that."

You colleague has not understood OSM, and I would not map a single house for someone with this attitude.

There are plenty of poorly mapped areas and one could add countless similar notes. They are not helpful since it's obvious to every mapper and will not encourage anyone. They only clutter the map making valuable information in other notes harder to detect.

Adding one note discussing the overall issue in the area is fine.