If you think America is a democracy, think again. It's not. America is a Constitutional Republic. The people do not directly elect the president and members of the federal government; the representatives of the people in each state elect them. The danger of democracy is the tyranny of the majority which leads to oppression and despotism of the minority groups.
It has some flaws, that is true specially when we talk about representative democracy, but democracy co tiniest to be the best way to approach the challenges and the future of society in which in person within it has a voice and a fraction of the participation to choose their leaders and take decisions based on the political affiliation of the chosen leaders.
Other systems of government like Autocracy are way faster to create scenarios in which corruption is blatant and difficult to stop in the short time, while in a system like the United States have, it is possible to prosecute those who have been caught abusing their position of power to personally benefit from it.
Nobody is supposed to be above the law and nobody is supposed to be able to disfranchise the will of the people to steer their country.