Don't know where else to post this but I guess here is a good place because I'm wanting help to know where I might be lacking in terms of mapping. I've tried to become better at detailing and making it so a room in a map isn't just some empty place. 
You can't see the room that good but this was when the room was basically empty.



This was the room after a hour or two of work put into it. You can't see it that well but I also made sure to make it so the area is not flat.



Any constructive feedback is helpful. Just be mature about the feedback and don't go throwing cuss words out at me. xD

For decals like blood and cracks, use fit option, so that doesnt happen like your blood decal in floor And also, make them patches, will be easier to manage with them that way

It does look better than before. Just make sure you don't add any unfitting models just to fill space (like the sandbags would make more sense if you could see where they come from).
And the decals could be done a bit better, but that comes from training.

Thank you both for the feedback ! @Hitman I didn't notice that till not to long ago and I've always been doing decals as just having the front show with the nodraw tool. Patches sound a lot easier can't believe I have not tried that ! @ Alerion thanks man. I'm trying to improve my skills!