In fact crumbling ruble might be an annoyance for Russian middle class but it is certainly a gift for manufacturers and exporters.
It makes imports way beyond rich of local customers forcing them to buy Russian.
Also exporters’ costs are all in rubles, making their products more affordable abroad.
Thank you for ably demonstrating you are just as clueless about economics and banking as any typical Russian Communist ever was. Russian manufacturers simply cannot come up with enough Russian rubles to produce much of anything anyone outside of Russia would ever want, and not enough rubles to continue operations to deliver sufficient products for the domestic markets.
The only problem with Domestic Russian Manufactured Goods is that they are complete crap. What do they export other than oil and weapons?
You are exactly right, and in an environment where world trade operated on something resembling a level playing field that is exactly what would happen.
But that is not the environment the world is operating in...due in no small measure to the group of psychopaths running things in the West.
The fallacy in your thought is that Russia can’t manufacture the things people want.