Just because you've seen worse doesn't excuse it. Everyone who behaves this way should find ways to deal with their emotions in a healthy way that doesn't negatively affect others.
Nordic and Central Europe cultures value 'straight talk' and saying what you will do, and doing what you say you will do. Generally when you ask for feedback you are expected to have a thick skin when professors/experts review your work.
I am not excusing abuse but I am pointing out that it is misguided to look at one work culture through the lens of another.