In this case, my strategy would be to turn criticism into a potential improvement, and focus on the improvement. Take every criticism seriously, frame the prob

In this case, my strategy would be to turn criticism into a potential improvement, and focus on the improvement. Take every criticism seriously, frame the problem, and seek a solution. For example, he says your decision to consider an offhand comment from your manager as a hard requirement was a bad decision. First, was it? Let's say it was indeed a mistake. Now, how to avoid repeating the same mistake, because clearly, there is a communication problem. You can then try to make suggestions, maybe formalize requirements a bit more. And if you have no idea, don't hesitate to ask "How can I do it better?", after all, you are the junior, you have a lot to learn, they have experience, take it. If your boss is as smart as you think he is, only good will come out of it. If he has no idea but he continues criticizing you, maybe he is not that smart after all. But if the suggested solution is for you to work harder, run away.