I've admired PG and his essays for a while, but I've started paying more attention, and thus I'm starting to realize he's somewhat thin skinned like that; this is exactly the feeling I got after reading this new one.
Similarly, he's been passive aggressively "responding" to VC criticism by subtweeting and deflecting, and never directly addressing, some of the points raised by @DHH and others.
I take everything he writes with a grain of salt now. As a result, I started to realize his essays tend to be can defensive or just contain a lot of bias, rather than being truly introspective.