Ah, your are using meshes.
Then you have to modify the material -> in the material add a texture coordinate node and connect it with the UV from the texture sample. Now you can scale it so that it’s not strechted anymore.
But I personally would recommend you to not scale meshes into just one direction as it will strech the texture.
The material on the floor looks correct -> it’s just a little bit too large = use a texture coordinate node 