Sure the wet markets are an issue, and they should be banned, but that's just one way novel viruses can arise. Bill Gates warned the world 5 years ago to be ready. You should be more angry with global leadership, and your own government specifically for not taking the issue seriously. Especially your for profit health care system, you'd get far better returns worrying about that than worrying about China. It happened, and a pandemic will happen again along with that other pesky issue called climate change.
If we had to worry about every time a nation made a bad decision we could sit around and point fingers all night. Like I said get Trump to allocate some of that military money or some of thqt corporate welfare fund into health care and pandemic preparedness and you'll see far more results than boycotting Walmart.
We cannot change the past only learn from it, all governments except a few who experienced pandemics like Korea were even close to being prepared. Trump is a "unique" phenomena shall we say and the sociopath is doing a spectacular job of dereliction of duty, unfitness and incompetence, no nation could do better under such horrible leadership. What brought America to this point is the topic of ongoing discussion here and I'm sure the Americans will clean up their mess after a million dead or so, they are paying for Trump bigly.
Pointing fingers at this stage of the game does no good, they are even going easy on Donald because he's so sensitive and might shut everything down if they upset the child. Like wise pissing off China at this particular point in history is unwise too, since they control the production of PPE and pharmaceutical feed stocks. They too have learned a lesson from this shit and their accounting for it will come later, like Trumps. Right now it's a fight for survival, both for us, our parents and grandparents, everything must be thrown into the battle and all options exercised.
The whole world is undergoing upheaval now, from me on a remote island in Nova Scotia, to Abandon on the other side of the planet, all are sharing the common dread, if not for ourselves, then for those we love. We are all in this together and that makes us strong, we are human after all.