Capitalism is not only successful on economic matters. Poverty, for example, got reduced significantly during the last decades.
Poverty does not have to exist. Having “only” 750million people living beneath the poverty line globally (and a similar proportion in the U.S., about 11%) is not success!!! It is a mitigation of failure!
[1] - One commenter on this site last week or so in the VC community commented there are “trillions sloshing around.”