Just because communism had different problems than capitalism doesn't make it a better system. I'm quite skeptical of ANY system that centralizes power into the hands of a small group.
That said, actual communism (by which I do not mean Marxism or Lenninism) works quite well in groups small enough that everyone knows everyone else. Probably up to around 50 people. Even there it needs escape hatches, and it fails if applied dogmatically rather than as a natural result of the group's underlying philosophy. Usually, even for this kind of group you need a charasmatic leader to make it work. As the group size increases, it performs more and more poorly.
I'm not aware of any group at any size that works well under a capitalist internal philosophy. Unless you include treating people as disposable tools as a part of working well. That said, it has certain features which allow modified forms of it to scale much better than communism. (What is normally called Communism, i.e. Marx/Lennin/Stalin/Mao-ism is *not* communism. Lennin tried to make it one at an early stage of the revolution, but gave up the attempt quickly, because it didn't scale. So actually what that is is better called totalianism.)
Democracy also runs into scaling limits, though at a larger size limit. Athens was probably too large for optimal use.
Republicanism is better called inherited-oligarchy. It scales pretty well, as the Romans discovered, but also, as they discovered, it has a tendency towards dictatorship. Still, if you can put up with considering citizens to be chattel, then it can work well at a fairly large scale, depending on your transport and communications.
I dislike *ALL* of these forms. They all end up with someone who isn't affected making decisions for other people and using coercive power to cause those decisions to be enforced. This can occasionally lead to a golden age when you have a charismatic leader who actuall has the good of the country at heart, and has skilled advisors who do the same. This is, of course, quite rare. And usually even the charismatic leader has huge blind spots.
Note that the only one of these that scaled well was Republicanism. And as an external facing tool capitalism works well to allow the inner group to have and to hold power.
But I would truly like to encounter a well defined form of government that not only considered the needs of the citizenry (long term, not merely short term) but also scalled well. (This means it needs to be well enough defined that its scalability can be evaluated.) Even if I did, of course, the problem of getting from here to there would remain.