Answer:
Describe your own feelings rather than evaluate others.
Step-by-step explanation:
In simple word, David in the given case is not behaving genuinely and can be seen as an over dramatized individual with severe anger issues. He is lacking the ability to describe his emotions and feelings in a more sympathetic and humble way.
Rather than being rudely judgmental to others David should describe his own feelings that he does liked the act or mistake done by others.