Why are invaders so rude?

Idk maybe I'm unlucky with people, but every invader I have met in this game is so rude for no reason. No hello, no bow, no waiting for me to kill enemies. And after this guy killed me in the Sen's pit, me being low HP and fighting a demon, and him using a build optimized for pvp - he needs to make a point down gesture, like he is now objectively superior to me. I understand that people are not obligated by game to be friendly as reds... But why? I don't understand how is this fun. Or what's the difference between first and second Dark Souls, that makes DkS 2 reds friendly and DkSR reds not. Any thoughts?