Soviet bunker kit Free low-poly 3D model

Looked great until I downloaded it. Just ended up with a mass of individual meshes clumped together in the centre of the viewport with their centres of origin all over the place. Yes I know it's free, but what a mess to try and sort out. People who want to be 3d Modellers need to learn to group things into collections, and to identify them properly; especially when there are 2,953 objects clumped together. For example, there is a room that is obviously a bathroom/SaL. All the objects etc. that make up that scene should be joined together as one and placed in a clearly marked Collection Folder, for example Bathroom or SaL. Each item in that scene should be clearly named. Any body should be able to know exactly what a specific item is. AR_corridor:corridor:room12:room25:polySurface102 means nothing to me when trying to locate something, but Spiral_StairCase_Centre_Column does. I have downloaded complete buildings and what I saw in the thumbnail/s was exactly what I got in my viewport when I opened it. Didn't need to mess around. Was going to use it in my STALKER SOC game mod that I am building, but I don't know if I can be bothered sorting out the mess. Possibly be faster to model my own bunker system then to sort out the mess in the viewport and world outliner.