It's not alarming. What was the caller expecting the Publishing Corporation to do with his subjective complaint? Unfortunately, to my ears at least, he came across as a bit of a weirdo and not altogether credible.
That said, the response - or lack of it - by the Service Dept rep speaks volumes as the the training and closed-off mind that's required to "man the phones" at JW.org; the way he left long silences, wouldn't empathise in the least with the complainant, and the cold way he ended the call tell us that we're dealing with a corporation. And one that doesn't have a particularly good reputation.