The biggest COVID-19 failure is that COVID-19 failed to make a dent in the growth of the world population. It'll probably have a long term opposite effect by raising longevity due to an increase in health research. Of course, climate change is a much bigger killer than COVID-19 and has a better long term outlook, but it also has many extinction outcomes, which isn't desirable. Fighting climate change is only one piece of the capitalism-is-killing-us fight. So much pollution, so little time.