I am sorry but I fail to see how China being influential (which is already true to a large extent) would cause the world to be a worse place than it already is.

You could argue that what's going on in China is bad for Chinese people, but China's influence outside its border is much less significant.

This is going off tangent, but I would just like to point out that until now, China has not been deploying troops around the world and over-throwing foreign governments.