one thing that i see a lot of people do in their sculpts is large scratches or chipping. imo thats not realistic and makes the object look like a toy. but it could be just me
I think the level of wear on your asset looks fine. If it were a more maintained environment, I would expect fewer large damage. The scale looks weird to me because of the bricks in the debris on the ground. They seem too big and the only other bricks to compare them are smaller. They're about the size of breeze blocks / cinder blocks but look like bricks.