Capitalism was certainly an improvement from the feudal mode of production that it superseded. Feudalism was too an improvement from the slave society that it replaced. Modes of production have consistently, since the fall of the hunter-gatherer society, fostered hatred and a brutish competition for resources. Capitalism has taken competition and bloodthirstiness familiar to humanity and expanded its scope to the national stage. Facilitated by the rise of the modern nation state and the corporation, human relations have been commodified, and the profit motive has subjugated large swathes of the globe's population. When compared to the ethical standards of past systems, capitalism looks rather neat and humane, just as feudalism would look when compared to slavery. Only someone guileless could claim that capitalism is objectively humane, considering its expansion led to colonialism, both World Wars, and continued imperialism to this day.
Capitalism has modernized the world in spectacular fashion. But with that has come much bloodshed, despair, and oppression. We could rather harness the technology that exists today and channel it into creating a vastly superior system.