Doesn’t seem you unwrapped that wall correctly.
First select the wall in blender and click CTRL+A-> Apply Scale
Then with your object selected go into Edit mode. Select all your faces and click U and choose Reset (to reset your wrong unwrap). Then click U again and choose “Smart UV Project”. This will give you a fast unwrap of your wall. In most cases you would get acceptable results with that.
If you don’t like how “auto unwrap” unwrapped it for you, then you can adjust your uv islands yourself, rotate them and fix them to however you want them.