US didn't collapse after Vietnam, why would they collapse now. People who are politically powerless hope for catastrophe but the left in most countries no longer have the mass base and political power to do anything when the opportunity presents itself. There is a lot of work to be done.
I'm sorry for coming off as if I'm being a doomer or saying don't do anything. I'm saying the desire for total collapse when there's no party or movement (whatever your tendency) capable of taking advantage of the chaos is putting the cart before the horse.