Because America lacks peace, health and common sense, it is a maddening place to live regardless of it being a world super power.
America is a country not designed for humans to live, you are expected to be soulless cog in a giant industrial machine and to work until your dying breath, and probably still not be able to afford a home because the previous generation climbed the latter of prosperity and took it up with them.
(Baby Boomers: I lived in the most prosperous time in America and could buy a home on a single income with no collage degree. Young people just need to work hard enough to afford that $100,000+ Trailer Home that I most likely bought for $20,000 but reselling it 500% of it's original value. Hey! That's not scalping! That's Investment!)
People are opting out of having children because they can't afford it, and even then American women are sexually immoral harpies that hate men and yet are pregnant enough to want an abortion.
(For being strong and independent women, you sure are pregnant a lot!)
They also complain about men's interests and behavioral habits and if they were to explain how men should be- and actually meet that kind of man out in the world, they treat him like garbage and sleep with the kind of man they complained about being "Problematic" in the first place.
They also drool over psycho serial killers and send nude pictures of themselves to them while they're in prison, but if a man wants a young cute virgin, they harp on him and call him a "predator". (Rules for thee but not for me)
America used to be a walkable country but it was bulldozed for the Car and thats a giant conversation to be had and I already complained about that.
There's even more incentives to leave America and find that "American Dream" in a foreign country because you might find a country that wont lie to you, abuse you and treat you like a walking flesh of nothing-but-a-worker-drone but dangle that "Land of the Free" slogan in front of your face while punishing you for saying the "Wrong Words".
Little of what you say is true. I've lived overseas and been to a lot of other countries. And I think it would be good for you to get off the internet and out into the real world more. Those marxist youtube videos will rot your brain and leave you feeling helpless. Seriously at the very least take a week or month off of online content in favor of worship music or going for a walk or working on making something and see how it affects your mental state.
Now some things are true. It's become acceptable in some circles to discriminate against and villify straight white men in media and public discourse. And it's doing a lot of damage to our young men. It's harder for them to find jobs and get started in life. And yes it seems like women (especially liberal women) are suffering from a mental illness of thinking that bad guys are just misunderstood heroes. And most of them are competing for the top 1% or less of men's attention because they've been fed a lot of slop about how they deserve the absolute best.
But other countries aren't much better. Have you paid attention to what's going on with the migrant crisis in Great Britain which is fast becoming one of the best muslim countries to live in? Did you know that Canada has killed more people by maid / euthanasia than have been killed in the US in shootings this year (and their population is like 1/8 of the US)? Slavery / forced labor is still alive and well in north africa, china, and other places in the world. And many of them would love to have a workday that lasted only 8 hours.
And the US was never perfect, segregation was still a thing when most of the boomers were born. If cities were walkable it's because no one had a car and could afford to live further away, affordable cars allowed people to leave the cities. We produce food in abundance and while that's caused some problems, even the broke in the US don't have to go hungry because we've got so much food we give it away at food pantries and soup kitchens, etc. And if you think working conditions are terrible and people are treated unfairly, please go read the first half of Upton Sinclair's The Jungle to get a much better idea of what it was like around 100 years ago. Where employers kept you waiting around for work but didn't have to pay you for that time and food was largely unregulated and way less healthy. And even growing up some of the boomers didn't have indoor plumbing and most didn't have air conditioning, microwaves, or TV's.
What we've forgotten in the US is that prosperity is the result of hard work and innovation. Life is a lot of hard work and time for any kind of leisure was reserved for the elite of society.
And as a wise wizard once said - "All we have to decide is what to do with the time given to us." So you can sit around and listen to those who make big money feeding your grievances and convincing you that you've been victimized. Or you can learn some skills and either create your own job or convince someone else that you're worth paying to do something for them on a regular basis. And if you have to ride your bike in the rain to that job or beg for a ride for the first 6 months that's just what you have to do to get started out in life. If you have to move out of your parents' nice 4 bedroom house into a little studio apartment because that's all you can afford then that's what you do if you value the independence more than your comfort.
Took me a long time to learn that and get myself accustomed to a life that was less than I had growing up, but it was worth doing. So learn money management, learn where to get good deals (like $10 / month cell phone plans through mvno's) and to separate your wants from your needs . But if you can learn to be content with simple things and connect with people at church and work and enjoy cheap fun then you'll be much closer to having the riches that previous generations did (because they didn't have near as much stuff as we do).