Where shortages became the norm, people had to share toothbrushes in Russia because it was considered a capitalist indulgence to have your own; and China’s Great Famine where some parents resulted in cannibalizing each other’s children.
When you kill off all your educated and skilled workers, form a central control on production and decision making, remove incentives for people to innovate/improve, you get the fruits of communism. Mass starvation, death, and poverty for those not in power.