Random thoughts: The US is much more developed but only slightly more just or fair than China. Therefore, the corruption in the US is worse than that in China. (Does that even make sense? Well, one merit of being random thoughts is that it does not have to.)
Below are my suggestions:
I also realized that the dark side of America => I have also realized...
from the public eyes => from the public's eyes
I believe it is fair, I believe it is free, I believe it values individuals. => I believed it is fair, I believed it is free, I believed it values individuals.
If you don’t know how much is 15 trillion dollars, this link might be able to help => If you don’t know how much 15 trillion dollars are, this link might help.