That's kind of the point, and what the creators intended to convey since the pilot. A group of unrepentant, self-interested assholes that work in a bar together and get into a series of misadventures through a combination of crab mentality and thriving off of the misery of others. They're incapable of admitting that they're assholes or seek to better themselves (except Frank who seems to revel in it), so they're stuck with each other and can't make friends outside of their group because they're such assholes. Consequently they've formed an incestuous codependent relationship that feeds on the misery it propagates and loops back on itself where they have to contend with preying on each other as a means of distraction. And since they'd rather be together and miserable instead of lonely and forced to endure self-reflection, they're each stuck in their own personal hell where they are surrounded by people they loathe, but loathe marginally less than everyone else in the world. It's like the play No Exit, but with 5 people instead of 3.JimB said:Anyone from It's Always Sunny in Philadelphia. I can't stand any of those assholes, and just want them to all die. I don't know why I hate them so specifically for being assholes, because there are other fictional programs about assholes that I can totally get behind (Archer comes directly to mind), but I have too much contempt for the gang to even enjoy the show.
It's not for everyone (and I'll admit in the later seasons they've kinda become caricatures of themselves), but I like it and the fact that (for a sitcom) as the series progressed instead of maturing the cast has become even worse.