Traditionally, the term “capitalist” means “person with capital” in contrast to workers who only have their workforce to sell. The term “capitalism” is a later development linguistically.

If you have been to other countries, you saw what the capitalist world systems does. It’s not that some countries are capitalist and others are not, it’s that some are exploiting others in the capitalist world system. That you can buy the newest iphone means that someone made it.