The Comey case is interesting. I can certainly see it as "the US is trying to be authoritarian" (or at least the current administration is).

But the courts ruled in Comey's favor. There is no reason to think that, if the feds try again, the courts won't rule for Comey again. That's still "rule of law", no matter how hard the current administration is trying to make it otherwise.

Now, sure, in an ideal world the case should never have been filed. In a just world, he would not have been put through that. And in an even-somewhat-ideal world, the case would not be re-filed. Absolutely. But for all that, the situation in the US is not (yet) as dire as you are painting it.