People who are narcissistic commonly feel rejected, humiliated and threatened when criticised. To protect themselves from these dangers, they often react with disdain, rage, and/or defiance to any slight, real or imagined [7]. To avoid such situations, some narcissistic people withdraw socially and may feign modesty or humility.
- wikipedia.
Alex exhibits no change in behavior when critisized. He seemingly totally ignores it. And the second half of that describes me perfectly.