In my opinion, there isn’t anything wrong with one who is aware of their accomplishments and capabilities and acknowledges them, it is the fashion in which one projects themself and intention behind their own recognition.
I think with certain people identifying within their attributed description, as they may also detail in regard to others, is harmless and not meant as to gloat but as a form of expression or discovery.
When arrogance becomes hubristic there is another scene bringing impact into the story.
As a child on up my mother loved and was proud of me yet she never bragged about me to anyone.
Peers would come to her boasting how their wife was this and their wife was that, their kid was this and their kid was that and from the constant proclaims my mother knew honestly their wives and children indeed weren’t shit.
Time brought out just how much the wife and kids of these braggarts had amounted up to, a figure not summed within the scale in which they smugly dared to measure, but a scale that announced a degree of great shame and embarrassment.
One’s looked down upon arose to bud, then bloomed on to become a bouquet of sprouting flowers, ones that were once the object of disdain became the example of a noteworthy and momentous acclaim.