A quick real-world example of how a company can behave in an 'evil' manner even though nobody involved sets out with explicitly malicious intentions, in a hypothetical SaaS company:

1. Executives set revenue targets for departments to hit, to 'increase efficiency'; departments that do not hit these targets risk being terminated as a cost center.
2. Department manager wants to make sure nobody in their department loses their job, and so tries to maximize the revenue for their department; in the process, they veto things that could result in reduced revenue.
3. Developer ends up not implementing cost controls on their service, because it might unexpectedly block service of customers, which reduces revenue because it's an extra hurdle to reactivate the account or change the limits
4. Customer makes a single mistake and ends up being charged more than they could possibly afford, because there are no cost controls.

Nobody in this chain was being deliberately malicious. Aside from the capitalist nature of the enterprise, everyone involved tried to do what they could in their situation.

And yet, the outcome is a hostile system that will screw people over with little to no recourse, and that is unlikely to ever get fixed.