See I like Always Sunny but the joke in Always Sunny isn't about narcissistic psychopaths from afar. There's many layers of joke in that show. Sometimes the joke is that the apparent voice of reason has just as poor reasoning as the rest and they only got it right by coincidence. Sometimes the joke is that every time you think there's a genuine moment the rug gets pulled out and its revealed to be a scam or setup. Sometimes the joke is in the way they don't react to any tragedy going on around them. Almost always the joke is to subvert the tropes of the "20-somethings urbanite sitcom" genre (cheers/friends/HIMYM).