But capitalism doesn’t explain itself in terms of “the owning class” screwing everything up out of self-interest. Capitalism will talk about positively channeling people’s self-interest. The intent is to construct a system that benefits people the most.
It’s objectively not working as intended unless you think there’s like… a hidden conspiracy behind capitalism where the elites carefully inculcated an economic theory over generations in order to normalize a system that would end up solidifying their status for hundreds of years to come.
It’s not working as intended, and it won’t work as intended, therefore we shouldn’t try to fix it.