Hmmm. I wonder why there are more posts about US news than Cambodian news. Why is that? Do you think it could be a conspiracy by thousands of users to flood the Fediverse with US news pieces to try to drown out all of the Cambodian news everyone would prefer to hear?
Or maybe the content you see is whatever is on people's minds, so they post it. Maybe you can post some Cambodian news instead of complaining about the lack of it. I'm interested in Cambodian news too, so please feel free to post all that sweet, sweet Cambodian news you are so upset about not seeing.
You asked why you were downvoted. It's because of your arrogant attitude and trolling. But, I'll sometimes have some pity and feed the troll.
You asked why anyone outside the US should care what happens in the US. The answer is very simple. If the US experiences a collapse of some kind (which it might), it will have a profoundly negative effect on the value of currencies worldwide, including the EUR and GBP. So, no matter how much you hate it, the value of your currency is affected by the value of ours.
That's just one reason why you should care about the rise of conservatism and how it harms the U.S.