not quite, but a lot of the textures are incorrect and look bad, and you will get an “_orphaned_hidden” visgroup, which means some of the vmf wasn’t read correctly (or something).
usually, when there is an “_orphaned_hidden” visgroup, it hides some parts of the map and even if you toggle the visgroup on, the content wont appear. if you have the visgroup selected and hit “mark” (if the visgroup is enabled), it will select the invisible stuff, and you can copy it into a new map, or paste it into the same map and position it back into the same place.in the case of this map, it hides a couple of details in the map, but i currently can’t remember them.
there are also some completely weird mapping practices, due to the map being over 10 years old.
as i said, the map will take some working with to get it to be good