Your memory fails you.....
Initially people were being evacuated from Wuhan, back to isolation in the UK... struck me as folly but it didn't seem to cause any real outbreaks. It was caused by workers in the luxury leather industry, Chinese, returning to Northern Italy, where a few well attended local soccer matches spread it further, before local governments knew what to do. China was already locked down, Italy followed, with people singing from their Juliet balconies. It got to the point that Thais were recoiling from Italians here, not Chinese!
Sinovac, it is well known, is not very good for the later strains, and the heavy handed lockdowns has left the population mostly open to infection, as they try to open up....
I don't decry all the efforts of Nations, and it appears China's approach was not a success, more a delay. But what happened in Brazil and Peru suggests to have done nothing , would still have been a bad result. Perhaps there was no way to beat this virus other than time.
My other thought... there was some serious cover up going on here in support of China, who at the time was wailing they were being made to look bad after infecting the world!