Of course you should hold any and all countries' leaders accountable.And Western leaders don't? Their response to the virus has been incredibly bad. Repeated the same mistakes over and over again.
Other countries (FSU) did things efficiently and started early, resulting in much lower numbers.
But, as China was the first country to face the crisis, their response and reports were the most crucial in the first days of the pandemic. The minimum you could ask for, was more transparency. This would have allowed other countries to better prepare themselves.
Instead, there was misinformation, doctors were threatened from sharing real-time data, local journalist/s disappeared and international journalists expelled.
So, yes, China has a special liability, not just because it allowed the outbreak in the first place (either the wet markets or its biological research facility), but because of the way they handled it since.