I was thinking the same, but it’s easy to do so when it’s not your life’s work— especially something that took so much time and dedication. The quote about the Lolita film was pretty damning, and imagine the shame of accepting that you had botched the adaptation of such a prolofic novel.
So what, everyone is supposed to pretend that everything Kubrick touched was completely perfect?
That would be a hagiography, not a serious artistic critique.
It seems more than fair to point out that Kubrick was touchy and thin-skinned. You could argue that it's an inseparable part of his overall genius -- but only if you're allowed to criticise him in the first place!