If it was designed and released then they did an incredibly poor job, given the fatality rate, and the fact it hardly effects children. If I'd asked someone to design a killer virus and got this, if be asking for my money back
That entirely depends what your aim is though, surely? If It's to cause death across the board of people you consider to be "valuable" to society, you are right, it's refund time.
But anyone who released this intentionally is Cleary a psychopath. And, as such, would see elderly, vulnerable people as collateral damage.
If your aim is to terrify, cause deaths of people who "don't matter" to you, create anger towards China to whom you owe trillions (more than the lockdown of your own country costs in the short term), provide a reason to avoid paying them back, enable sanctions and possibly war against China, which boosts your own economy AND wipes out the people in your own country that cost a fortune to look after........then that's been done pretty well.