Sure, but “JavaScript [is] utterly broken, incapable of executing the simplest programs without errors” is a bit much. I find it hard to believe that even when I’m completely out of touch, I’d say that about a language that people are obviously productive in (as much as I hate JS myself).
Sometimes when I play a point n click adventure and I am stuck for hours on a puzzle I tend to think: I've tried everything... surely there must be some kind of bug for why I am not proceeding.
Only to then realize (after reading the walkthrough) that there was indeed a way.
I think it's human nature to find (rather search) blame not only in yourself but everywhere else... anyhow, since the author is reflective we should be forgiving as well.
Obviously he's not serious, he's playing the part of the out of touch old man.