Triumph of the Won't
The Mirror, Guardian line is a kind of anti-cuts, pro-living wage position but churning out daily anti-Corbyn/McDonnell articles. They must know that doing this Anti-Corbyn, McDonnell stuff makes the fightback harder.
The chorus (now joined by Owen Jones) slots in with the people who aren't anti-cuts, pro-living wage and never were, turning it all into a general and constant anti-Labour burble. It's a defeatist, triumph-of-pessimism way of going on.
Never mind Triumph of the Will. It's the Triumph of the Won't.