Why do some people seem to be forever defending, explaining or justifying themselves? Do you enjoy being around this person? Are you one yourself?
We tend to think that criticisms come from other people. But in truth, all things that we perceive as criticisms originate internally, born from our constructed self-image -- how we like to think of ourselves and how we want others to see us.
I have been stung like Swift. It's never fun. But the more experience you have with it, and the less you care about what some guy thinks of your work, the more you learn to save your energy for what is important.