It’s one of the worst countries in the world according to many non-Americans
Um no
You're listening to the proud nationalists that always have something to say when you mention America in Youtube comments. They'll have something to say about every nation too for that matter
But you're not listening to actual statistics
America's world reputation is nowhere near the bottom according to global polls. And statistically speaking, America has a whole lot more shit together compared to many other countries in terms of economics, infrastructure and politics.
Trash dump? Hunny, you aint seen nothin'. If you want a trash dump of a nation, check out North Korea. NK has completely gone to shit. The US is nowhere near that level.
Obese people? What, you think that's the worst thing a nation can have? At least you actually have the privilege to find a McDonalds in every town
Is the US goverment a mess? Yes. And that's why I'm staying in NZ. But don't expect any less screwed up goverments anywhere else. At least you can vote where you are. As mentioned by other commenters: every other nation has their fair share of bullshit. You're just only focusing on America's problems and ignoring the many, many other problems shared around the world.
By all means go to Europe. It's a nice place. Travel the world. That's a sincerely great thing to do. But everywhere you go, you're going to find a downside. Only now you'll be away from family and you wont speak the langauge. I advise traveling to other nations, but not under the expectation that everyone else has it better. You'll be disappointed