Only a shallow-minded pinhead would claim that Marx was 100% wrong, all the time in each and everything he ever said.
Marx was horrificly wrong in believing he could construct some kind of communist utopian alternative.
But his fundamental economic analysis regarding the socio-economic consequences of an overabundant supply of labor in the marketplace is in total agreement with the theories of Adam Smith and David Ricardo.
It's Economics 101, Luis.
Learn something about it.