No, I think it's mostly just as angry and bitter as it sounds, coming from people who backed the wrong horse (ITS, Lisp Machines, the various things Xerox was utterly determined to kill off... ) and got extremely pissy about Unix being the last OS concept standing outside of, like, VMS or IBM mainframe crap, neither of which they'd see as improvements.
Just because Unix was the last man standing, doesn't mean it's good. Bad products win in the marketplace all the time and for all kinds of reasons. In Unix's case I'd argue the damage is particularly severe because hackers have elevated Unix to a religion and insisted that all its flaws are actually virtues.
