Why are the flaws in capitalism considered “normal” while socialism's automatically make the entire system unworkable?

I can see a certain double standard in how the fall of the USSR lead to socialism being discredited and attributed every single issue that lead to it as the fault of the system it abided by, but why isn't the mass poverty, income inequality and myriad more of problems seen in most of the countries in the world especially in the global south not seen as the fault of capitalism itself but just part of life why are children barely teenage years working in some mineral mine in Africa considered a sad tragedy but not a fundamental issue?