Capitalism 'just' creates strong incentives for participation in zero-sum, or negative-sum games, without any in-system ability to check it. It 'just' creates strong incentives and imperatives for consolidation of wealth and power. It 'just' trends towards winners winning more.
Under it, a dollar is a dollar, regardless of whether earning it improved the world, left it about the same, or made it worse. Unless you make your dollars have colour[1], it falls into the traps described above.
Fortunately, all capitalist societies, to some extent, assign their dollars colour, through the process called 'regulation'. Unfortunately, the process through which it is produced is called politics, for which we have no good solutions for, and a slew of bad ones.
[1] https://ansuz.sooke.bc.ca/entry/23