As someone who has studied the virus itself quite extensively and helped the senior geneticists map out its genome for the production of test kits, I can say that the virus has its own merits for unusual mutations and genes but that in itself isn't sufficient to pin down the virus to underground laboratories in China. For novel viruses, we are expected to see some random fuckery in gene sequences, which SARS-CoV-2 clearly has. There are also some parts wherein the virus appeared to have been inserted with some carefully-concocted gene, but those parts were also seen in some bats carrying different strains of the said coronavirus, which rules that possibility out.
If, and if the virus was really made in the lab, governments should file a case against the laboratory in particularly who engineered it, but even independent, non-government researches funded by private firms are disagreeing to this scenario. Perhaps people are formulating different cases in their heads to favor what
they think is happening. Since the economy of the world took an instant hit the moment economic lockdowns and closures were set into place, people quickly rushed to the conclusion that this is an elaborate plan to sabotage the economy and to help the superpowers do an economic reset, which isn't even happening and are even flinging them further into the debt oblivion.
There seems to be no reason why these Western entities should, with one voice, cover for China's mistaken or deliberate release of the virus, UNLESS...
They aren't trying to save China from a pitfall but rather acting logically so as not to cause panic all over the world. The last thing that you want to incite during these hard times are mass gatherings and public outrage pointed towards someone not proven of being guilty. If the Westerners are covering up China, why the hell would Trump release several derogatory remarks to them during the spread of the virus?
Further (circumstantial) evidence of a co-operation includes the fact that, somehow, all major Western countries allowed the virus to spread until it was too late for containment, and had to shut down their economies.
This is because there were only little information to work with back in February to early March about the virus and how quickly it spreads. The initial reproduction value of the virus was set at R0>3.0 which was dismissed by several research institutions and placed it to a mediocre R0>0.9 which
isn't really a cause for concern for most epidemiological models. This resulted into countries issuing only guidelines for physical distancing and wearing face masks which, of course the citizens gladly disobeyed (the USA is a prime example, heh, spring breaks). Little do they know that this virus will grab them by the pussy (heh) and make things worse than it already is on other countries.
What happened to the US, Spain, Italy and other European countries wasn't an elaborate collaboration to reset the economy by deliberately spreading the virus but rather lack of preparation and their ignorance to the actual numbers re: COVID-19.
Also, the repo market crisis erupted in September, and the Federal Reserve seemed unable to fix it once and for all. This suggests something deep in the financial system was already broken beyond repair. In addition, there was a Canadian lab which had a habit of getting its materials 'stolen' by Chinese (as Canada was not subject to strict post-9/11 controls over US labs.) Its director suddenly died on a business trip to Kenya during the outbreak in China.
Still, this does not explain the collaboration you are mentioning that includes the West and China. Why would they inflict more problems on their already insurmountable financial problems in the first place? Heck, stimulus funds, giving aid to all citizens and frontliners while imposing closure of their country's source of profits for.. an economic reset? That does not pan out and will not work out well, amigo.