No, we've had much worse episodes in our past, and the dooming about democracy is getting annoying. Yes, the U.S. is no longer the unchallenged superpower in the world and our society is becoming more polarized and unstable, but we are nowhere near how bad things were in the 19th Century.
We can have a regression in social cohesion and our political stability without necessarily declining. If anything, this increase in short- and medium-term tensions could result in a healthier society in the long-run.
Imagine if this board had existed in the 1850’s.