Indeed, and the broader article I linked does make that point.
It's a losing strategy, an almighty squeal, but it is a strategy...and it's one which suits the temperament of a profoundly narcissistic personality.
In clinical psych a distinction is often made between arrogant/full narcissism and depleted narcissism
Depleted narcissism has more vulnerability to defeat and envy of others' successes
Brutish behaviour is to defend against large defeats and the accompanying 'annihilation' of ego
Fantasy is another defence when you have depleted narcissism
Trump displays a lot of this type of narcissism