> Criticising our entire economic system tends to have very little effect.

I think its actively counterproductive. Criticising the entire economic system doesn't do anything. Complaining in broad strokes about stuff you can't change reduces your sense of agency over the world.

Also, if people believe that businesses must be sociopathic, they will make sociopathic choices in business. The belief reinforces the problem.

It's not that they must be, rather that they are incentivized to be. If you dangle money in front of them what were you expecting?