I'm pretty sure that it's natural to feel hurt and discouraged when people say hurtful and disparaging things. This is part of the human condition, and it's why we have the concept of "hurtful words." Buddhist monks train their whole lives for the kind of emotional control you seem to expect from people, and most of them still don't have it down pat. It's not about being egotistical — it's just the way most humans are wired. We care what other people think.