Hi,
welcome to OSM!
Could you explain the source of all these POIs?
If this is an import from some external source, please have a look at the OSM Import Guidelines:
https://wiki.openstreetmap.org/wiki/Import/Guidelines

Many of the nodes seem to be in incorrect places - many are just in the middle of a wide road with the next building 10 or 20 meters away.

All the nodes also contain a tagging mistake: you wrote "add:country" instead of the correct "addr:country".