Finally Rob receives the recognition he deserves:as an utterly hopeless loser.
He's a cartoonist whose art is execrable, and whose humor is non-existent.
His lifetime of rejections is testament to that.
Rob is a lot like Pitt, unemployed, unemployable, lacking any marketable skill, living off his wife's labor and whatever may have been earned by his family's productive generation.
Of course McGrath is stupider than Pitt, and a lot more sober.