For one, "Communism" is presented as a single monolith, but it's not: it's socialism PLUS despotism. The despotism part is really important! China/Russia/etc. fail because they try and control things top-down, instead of letting the market decide.
However, you can have socialism without despotism! Tons of European countries are far more socialist, but no less democratic than America (many are more democratic).
So yes, America vs. Russia/China and Capitalist vs. Communist are relevant frames ... but don't let them obscure the fact that you can have a successful, democratic country .. without doing what America does (and giving all control to corporations).
China is despotic in its treatment of political dissent and human rights, but not in economy.