You can question the methodology, but then you have to make an argument as to why Norway, New Zealand, Finland, Switzerland, the United Kingdom, Denmark, the US and other mature social democracies which routinely top these rankings are not good places to live. Very few citizens of those countries would choose to live in Xi's China instead.
I only have to make the argument that personal freedom is not as important as economic prosperity. Since the end of the Cold War the general thinking was "democratic ideals -> economic prosperity -> good life". China's economic success without embracing democratic ideals to the extent that successful Western countries is making people and governments once again question whether or not the democratic ideals are actually needed.
I would rather live in the US or Europe than China at the moment, but how long will that remain true for most people if China surpasses the US as the world's reigning superpower?
But that's not the relevant question. The relevant question is whether the businesses of those countries would choose to do business from within Xi's China.
With several eastern European countries trending in an authoritarian direction (and Turkey pretty far along that path already) I am worried about the effect that Chinese prosperity without democratic ideals will have.