I would imagine the first problem will be uncertainty. Will Emperor Trump raise taxes on the Blue States selectively again, or will he cut corporate taxes to the point that inflation runs rampant? Will Emperor Taylor Green institute price controls? Will Emperor DeSantis shut down companies that he feels are woke, causing layoffs? Will Emperor Cotton (ha ha ha, sorry) insist that police in "crime-ridden Democrat cities" be given the power to suspend habeus corpus, or make peaceful protest and assembly illegal?

It's hard to say how life will be impacted, but any of the things I mentioned are strong contenders. Agricultural products will probably churn first as we lose the people who work in the fields. Between inflation, which an authoritarian can't stop easily, and restricted immigration, food prices will soar. And then an authoritarian would be tempted to institute price controls on food. When Big Ag objects, what will the authoritarian do next?

In other words, not to be depressing, but it would absolutely suck.