Honest questions. Why do you seem unable to change anything of this? If you leave in a democratic country, why the majority of people won't change the second amendment, the college tuition scam, swap to a free healthcare system, and vote people that won't start another war in the name of democracy?
EDIT: I reckon it's complicated, but you must have some opinions about the final motive(s) for this. Who/what is keeping things like this?
America isn't actually a democracy. The views of the average person have no influence on what the state actually does. The senate is anti-democratic by design (see James Madison: “[The Senate] ought to be so constituted as to protect the minority of the opulent against the majority.”), and all of the founding documents were created by a bunch of slave-owning rich assholes to be as favorable as possible to themselves (reminder that slavery is still legal under the 13th amendment). The elected "representatives" do not accurately represent their constituents; compare the median wealth of a US congressperson (over $1 million) vs the median wealth of a US citizenfamily (~$121k).
The people who actually hold power in America (and indeed all capitalist nations) are the ultra-wealthy capitalist class, which is to say those who own the means of production (the factories, tools, raw resources, etc that a business needs to produce a product or service). In "bad countries" (Russia etc), they would be called oligarchs. Since its founding, the US state's primary purpose has been to perpetuate and grow the wealth of this capitalist class above all else. The interests of this capitalist class run counter to the interests of the working class, the common citizen. The capitalist wants their employees to work for as long as possible for as low a wage as possible, while the working class wants to work for as short a period as possible for as high a wage as possible. With this in mind, let's now go through policies you listed.
Changing the second amendment. The capitalists generally aren't effected by this, as they live in a safe and secure world separate from the general populace. However, this (and many other things, such as abortion rights and LGBT+ rights) serve as ways to divide the common people against each other, distracting them from the fact that their true enemies are the capitalist class. Between them, the state and the capitalists control almost all of the media in the country, so they are able to push the issues to the forefront. To be clear: I am not minimizing these policies. Things like gun rights reform, abortion rights, and LGBT+ rights are incredibly important;
they just don't matter to the capitalists.
The college tuition scam. This one is simple: the financial capitalists make loads of money by giving out predatory loans. They want that money, so the policy will continue.
Free healthcare. As above, the capitalists are making money hand over fist, and do not want to stop. Consider also that "Obamacare" and other policies primarily ease the burden on the common citizen NOT by regulating the healthcare sector to charge lower prices, but rather by simply handing tax-payer funds to the capitalists directly through subsidies.
In general, when looking at the policies pursued by a capitalist state, one should always ask "how does this benefit the capitalists?" America's foreign policy, for instance, largely revolves around keeping the "developing nations" of the world poor and their markets open to "free trade" such that their wealth can be extracted by American (and allied) capitalists at a lower price. Similarly, the US refuses to address climate change because the fossil fuel capitalists would stand to lose money.
The only way to achieve a better future is through the abolition of the capitalist class, which can itself only be achieved through a revolution.
So, in your opinion, what are the conditions the US people wait/need to start this revolution? What's holding people back? The newer generations seem to have almost nothing to loose, and a lot of older people barely can keep up.
In short, the working class need to be better organized, class-conscious (IE aware that they are members of the working class and opposed to the capitalist class), and militant, and the repressive organs of the state need to be much weaker. Organization is trending up with things like increased unionization rates (though many of those unions are collaborationist and not revolutionary) and increased membership in revolutionary orgs like the PSL or even reformists like the DSA. Class consciousness is increasing naturally as the social contract that bought off the working class of the USA (and the rest of the imperial core) is torn up and people begin to look outside the status quo for alternatives. Likewise, militancy will come once people have nothing to lose, and as you say, the younger generations are well down the path, but the key element missing is the aforementioned organization.
Unfortunately, it's not all good news. This mass radicalization will be slowed, and worse, redirected towards fascism, by that omni-present multi-billion dollar propaganda network controlled by the capitalists. Further, any increases in worker organization will be met with increasingly brutal crackdowns by the cops, FBI, and other alphabet agencies. Ultimately I find it far more likely the US will descend into fascism; it would not be unreasonable to argue that it's already there. That said, we must still fight for the better tomorrow we know is possible.
Because that's not the government works. The populace doesn't choose who the candidates are, introduce legislation, or (with relatively rare exceptions) vote on it directly.
Okay, but why do you not take a more radical approach? I mean, Trump followers were not right, but even they took the capitol by assault to accomplish essentially nothing. Most of these things exposed in this thread seem to me like legitimate causes to emulate some Malcolm X-esque actions.
I do support that, at least morally. In practice, a bunch of disorganized, untrained, and poorly equipped people who are already struggling to get by day to day are not going to win a fight against human history's most powerful police and military force on its own home territory.
Some are afraid, others don't know how, others feel like there's no use in trying. A whole lot buy into the American exceptionalism propaganda that gets shoved down our throats from birth and think there's nothing wrong with this country and that the people who are suffering deserve it, and that the people who want to make it better are literally trying to destroy it for Satan, or for the Jews, or for the reptilians.
Lobbyists lobby politicians so they won't make changes that hurt their business. Politicians in turn engage in brainwashing so the population agrees with them even if it actually goes against their best interests.
Trust me, nobody likes paying thousands for college tuition. But colleges lobbied politicians so now politicians won't do a damn thing about it, and the politicians that won't do a thing are now actively telling their base lies about how it's a good thing that they have to pay more than rent on tuition.