Is this a conservative value? a good economy? do leftists not value a good economy?

The term "the economy" here is too broad. Under Biden, by most statistical measures, the economy at a national level was doing pretty well with back to back 20%+ increases in the stock market in the last 2 years. But that wasn't what these voters were referring to. They were referring to their personal finances, their family's economy. Even the bits about not liking immigrants was their misdiagnosis that immigrants were negatively affecting their family economy. They think that immigrant being present meant that their family's economy was reduced. They think that any taxes levied on them unfairly reduce their family's economy. They were being squeezed from all directions, lower pay & job insecurity, sky high housing costs ("the rent is too damn high!"), out of control undischargable student loan burdens, bottomless health insurance and health care costs, spiraling home insurance costs from floods/wildfires/hurricanes, and finally the price of eggs.

These voters thought that this was a broken economy, but that is a misdiagnosis. This is an issue of income inequality. Too much of the wealth of the prosperous nation is confined to a tiny fraction at the top. And this mass of voters ended up voting to make this problem worse.

I am not a fan of Bernie Sanders but I guarantee he would have won. The Democrats refused to give people the policies they wanted.