Try not to get upset by people’s rudeness. Notice: how it never seems to come from someone who has ‘earned’ the right to be rude. In other words, this attitude (or stupidity) has not served them well. It has held them back and punished them. So you pity it, place it properly in context with the costs, or pretend not to care but don’t feel resentment if you can help it. Because they’ve borne more of the burden than you.