I remember when I first read xkcd. I was linked to there by former AoD/Mania poster Dani. It was this strip. I liked it because it was clever and funny and made reference to Richard Feynman, which made me feel smart and informed.

I've been a regular reader, but I've lost enthusiasm. Some because they are so esoteric as to be completely meaningless to me. Some because of a barely-hidden contempt for people not quite as gifted in knowledge of science/mathematics/engineering. And some betray a contempt for other people in general.

This one is just plain dickish. And this one "lampshades" (as they say in TVTropes) the dickishness of the strip.

I think the strip has descended into out-and-out misanthropy and I no longer take pleasure in it.