Sometimes there's a function to simply reacting to something naturally. Even in the absence of some sort of result-based benefit....one can also just allow themselves to be annoyed/offended. It's not like he started a fight or something....so there's not much negative results from his taking offence. He said a 'damn'. Expressed his frusteration to his date. Made a post to vent about it. None of which has harmful results.

A lot of people have alluded to the idea that I'd sum up as 'It's not worth worrying about because there's nothing you can do about it'. That may be true for some people. But living completely logically like that may turn into a form of self-repression in it's own right. As long as our reaction is not harmful.....it's ok to allow yourself to be hurt/offended and vent/express yourself about it. Regardless of in doing so, nothing is 'accomplished'. You could argue that the accomplishment is in expressing yourself.