No, America's economy has not improved. That's utter nonsense. We have rampant inflation in the essential parts of the economy -- gas, groceries, etc. We have millions, tens of millions, who have left the labor force. All the so-called "job creation" is simply reopening jobs that were shut down by the authoritarian response to the virus.
More people have died of COVID under Biden than under Trump, and now that we have a variant that, although contagious, seems to be fairly mild, they are bending over backwards to keep the panic going.
It's not about the virus. It's not about the economy. It's about power. In your party's world, whatever moves them closer to absolute power is good and whatever doesn't is bad. And the people are catchign on to this.