Instructions are the opposite of expectations. So often the lack of one leads to failure in the other.
When one of my daughters was learning to drive we decided to let her take a stint on the highway in Wyoming. I pulled off, she took the wheel, buckled up and proceeded to drive and start to turn onto the highway into the oncoming traffic, leading me to scream “Straight, straight, straight” at the top of my lungs. It was traumatic at the time though we laugh about it now. But the failure was on me for not ensuring she knew what was expected of her.
Often in life, work and love we have expectations that are unmet because we never clearly state what is wanted. Don’t count on anyone to read your mind, you’ll almost always be disappointed.