I absolutely wish this "stress" on them, because they deserve it for letting their company get to this state. And people who are good at heart don't let their company's culture get like that.
This kind of comment is too harsh and over-simplifies the kind of decisions that growth-phase startups have to face. You have many battles to fight, and sometimes you have to make a trade-off. In Uber's case, they prioritized hiring and firing people to manage performance over dealing with culture issues. Not saying the trade-off they make is right - I think they all realize now they cannot treat themselves as a startup any more - but claiming the management at the company are not good at heart is just totally unjustified. Do you also think startups that lay off people when they don't need them or move operations to cheap regions to also have bad heart?
Those are always rather cold-hearted actions. Employees are not a disposable quantity that you can dump at Goodwill like surplus furniture; companies should make sincere efforts to avoid layoffs.
EVERY manager over at Uber has to own this. They are the ones at fault. And right now, they need to prove they are good hearted. That is not an assumption to make by default.