^ The problem here is that he went off like a rocket without troubling to understand what was really being said. Yes, she used an obscure term, but 98% of the rest of the world understands that Cathy is a serious journalist, she doesn't have dementia, if there's a reference to a food item in one of her reviews, it has a reason for being there, it's not a random nonsensical insult.
Oscar comes off as having a mental age of about 7 in this. Cathy wasn't trashing his work at all, she was simply characterizing his approach to it.
Why not just pick up the phone and say, What the hell does this mean?! But no, he runs and takes out an ad because he apparently thrives on a public fight, like a brawling toddler. (I think 7 actually was considerably overstating the case ...)