The US is not some shining beacon of justice and fairness, it's just as corrupt and capricious as all the rest.
On the topic of US corruption, it will be interesting to see the outcome of the Mueller investigation. I suspect most of those at the top will get away with it with scant repercussion. At least, that's what usually happens.
Relying on a few references - precisely because it's not common - in a country of 330 million, does not support your claim. The reason cases of denied legal process get so much attention in the US, is because they're rare. The reason a million detained Muslims in China isn't causing an uproar in the Muslim world, is because they know China has no protections for human rights and it does no good to protest. Contrast that with the protests regarding Abu Ghraib. Why was that an massive, international embarrassment for the US, if it's just the same as China?
> it's just as corrupt and capricious as all the rest
Saying it, does not make it so. The fact that that is incorrect, is precisely why so many people - of such diverse backgrounds - want to immigrate to the US and have for the past century. Much of Latin America would immediately immigrate if given the option, because of how corrupt the majority of Latin America is (see: how low Latin American nations rank [1]).
The US routinely ranks high among nations on the quality of its justice system, the independence of its judicial system and its protection of property rights. That has been true for a very long time.
Transparency International ranks China #88 on corruption and Russia #138, to name two prominent examples.
Denmark is ranked #1 for lowest corruption, New Zealand is #2. The US ranks comparable to France and Japan. So your premise is there's no difference between the US, Denmark, New Zealand, France, Japan, China and Russia - since everyone is just as corrupt and capcricious as all the rest.
Of course that's not true. The US is a liberal democracy with vast protections for human rights. China and Russia, as contrasts, are regressive dictatorships with few protections for human rights.
Anyway, the US has more systemic problems in how it affords legal process to the accused. The widespread racism that still permeates the country's institutions. The misuse of plea bargaining, which seems almost designed to deny proper legal process to the accused, unless they're wealthy enough to challenge it. Even in sentencing, the US still uses the death penalty, something that most other countries, especially highly-developed countries, have abolished.
Us has a lot of flaws, and the justice system (for less affluent people) is a shame but it is uncomparable to a totalitarian regime.