He was a student of humanity and it's hilarious attempts at communication.
Read his books. He's deconstructs so much about communication and criticises systems that deploy twisted communication to achieve their shallow ends.
Carlin criticized the church before most of the public was aware of their horrible record on protecting victims. He criticized the right and it's fetish for fetuses but two fucks for living babies.
The world sucks, Carlin reinvented himself from his first foray into comedy as the Hippy Dippy Weatherman and realized that creating new criticism was a challenge worth his focus, and committed to creating all new material for each special.
I'm sad that you only see this, it's a superficial take on genius.