Jeezuz, I don't know about the bit about "the vast majority of Americans polled" in regard to the economy. You can probably shop around and find some polls that are worded and parsed in a way that makes your point. But there certainly are more that seem to counter it. In addition there is the old "right direction/wrong direction" poll that is ugly for Biden. And believe when they think the country is headed in the wrong direction you would have to work pretty hard to make the case that the economy is not part of their basis for saying that. There are other reasons, but it would be one of the pillars.
Because I am a giver, I will ya the part about there being "a lot going on inside the polls." It is complicated in some areas because voters/dems give points for what has happened during the administration but then also say they think Joe should be replaced. That can be a complicated scenario. You get some of that with Trump too. You can ask some voters if they think Trump did a good job last time and the country was better off then and they will say yes. But there also some who are thinking enough was enough too. So one has to be careful about making leaps without querying directly on that in a poll.
Nov 12, 2023
Financial Times
Only 14% of US voters say Joe Biden has made them better off
FT-Michigan Ross poll underlines president’s struggle to overcome impact of inflation on voters’ economic outlook
https://www.ft.com/content/c17c35a3-e030-4e3b-9f49-c6bdf7d3da7f
Well my point was there is a disconnect in the electorate between their perception of their personal finances and their perception of the overall economy. This is not insignificant. If you perceive the economy as poor then you are likely to drawback spending as you have some doubt of your future financial position. A kind of self fulfilling prophecy.