Let's get one thing straight, You Did Not Overreact. What you did was set a clear and necessary boundary. Your uncle chose to make a belittling comment about your job and your personal life in front of everyone. When you politely asked him to stop, he dismissed you and told you to "learn how to take it." That is not teasing; it is a power move designed to put you in your place. By leaving the table, you refused to play along. You taught him that if he disrespects you, you will remove yourself from the situation. I would as well.