Easy mistake to make. Leaving that aside, though, there is a clear difference between saying that "the UK is doing badly compared to some other countries" and "the UK's response has been the worst in the world". There's little doubt about the former: South Korea, Germany, New Zealand, a few other countries have clearly responded to this far better than many countries as shown by their respective growth curves, and that includes the UK.
My own feeling is that the countries with the worst responses to this would include, but aren't necessarily limited to, China, Russia, and Brazil. I don't see, though, how finding other countries that have done worse is in any sense helpful. The UK has made clear and preventable mistakes in its approach. To say so is not anti-British.