From your side, you’re working with what’s there, not just what’s drawn. Things don’t always line up neatly. You open something up and find it’s been done differently, or not at all. Materials arrive late, trades overlap, weather gets in the way.
You know this isn’t unusual, it’s just how building work goes when dealing with real conditions.
A change can feel like a mistake.
A delay looks like poor planning.
A cost increase feels unexpected.
Without context, normal parts of the job get read the wrong way.