Carlin has only ever been a "philosopher" to juveniles. He was right on corporate America and the American war machine, but he was a self-loathing misanthrope and nihilist
Nihilism and misanthropy are valid philosophical positions though.
No doubt but he's a comedian, not a philosopher. Carlin's crusty curmudgeon personality never did much for me. I'm an atheist but his whole anti religion shtick really turned me off.
I recommend consulting his early/middle material... 1967–1990 maybe. You're only really referring to his last 10–15 years or so.