I will defend a fairly extreme position: It's Always Sunny in Philadelphia is the best comedy on television, and it is not particularly close. People look at me strangely when I say this, usually people who watched two episodes, found the characters horrible, and switched off. That reaction is the whole point, and missing it is missing the joke entirely.
Most comedies want you to love their characters. Sunny wants you to understand, slowly and with growing horror, that its characters are terrible people, and then it makes their terribleness so precisely observed that you cannot look away. That is a much harder and braver thing to pull off, and they have pulled it off for longer than almost any live-action comedy in history.
Why the cruelty works
The trick is that the show is never on the side of its characters. It is always, quietly, on the side of the audience watching them fail. The Gang are selfish, deluded, and incapable of growth, and the show knows it completely, which is what separates it from the lazy mean-spirited comedy it could easily have become. The cruelty has a point of view. You are laughing at delusion, not at a target.
It also commits. Most shows soften over time, reaching for warmth and the audience's affection. Sunny has spent its entire run refusing to let its characters become lovable, which takes a discipline I genuinely admire as someone who knows how tempting it is to chase approval.
The craft underneath the chaos
What looks like anarchy is, structurally, incredibly tight. The plots are little farce machines where everyone's worst instincts collide at exactly the right moment. That precision is invisible because the surface is so chaotic, which is the highest form of craft, the kind that hides itself completely. The best engineering looks effortless too, and is never effortless. I respect anything built that well that pretends it was thrown together.
So if you bounced off it early, I understand, but I would gently suggest you missed the design. Give it a proper run and watch for how careful the supposedly careless thing actually is. It is the funniest argument I know for the idea that the hardest craft is the kind nobody notices.