It's more our fault than China's because:
China fucked over themselves and the rest of the world by having too many kids, which we are also doing, they just did it first.
Our main mistake that fucks over ourselves and the rest of the world is us being greedy war-obsessed psychopaths (while also having too many kids) and that's how we directly fucked over China and dragged them down with us for like 80 years before this, making their overpopulation crisis worse.
So they can always blame us for their problems more than we can blame them for anything.
Furthermore, it seems like their rulers didn't go as far with gaslighting the public. They did a little bit of the "pretend it isn't real and scientists are just lying or being tricked" bullshit in the beginning, and a little bit of the "pretend it's just a flu" bullshit, but they didn't go as far as pretending masks don't work. The US were the ones that went as far as possible with it and politicized shit like covering your face with a mask.
China's authorities allowed their citizens to have a real vaccine for COVID, the US didn't. The US only has bullshit COVID "vaccines" that aren't vaccines, based on mRNA and shit.
The US military industrial complex is clearly THE driving force behind this plan to engineer a virus in a lab, unleash it on the world, and use it to fuck shit up as badly as possible. They just used China as a lab location