Harris did not (or may not have) but Democratic punditry and commentariats were full of "the economy is objectively great, why is it subjectively sucking?" articles, for months.

Because they look at metrics like GDP and the stock market and unemployment, and fail to realize that it's not evenly distributed. Increasing GDP and stock market indicate somebody is making a lot of money, but the average voter isn't seeing any of that in their own lives.

Well, they look at average wages, average hourly wages, median household income, median disposable income. All of these things improved right alongside "inflation" to the point where anyone who was not an outlier for those statistics ended up no financially worse off (and arguably somewhat ahead) than where they were pre-COVID.

The problem is that people remember the "old" prices, not the "old" paychecks.

It has been said that people see wage increases as something they have a right too (periodically, anyway) but see inflation as something imposed by a 3rd party with bad intent.

I heard Biden and partisans say it a lot, and I cringed every time. In his first State of the Union, I clearly remember him bragging about record high house prices. I cringed at that too.

What did Harris herself say? Not much; she barely had any time.

There was one voice within the Democratic Party whose communication about this was good: Bernie Sanders.

The Biden-Harris administration said as much constantly.

When the gaslighting failed to achieve the desired effect (make everyone believe their grocery bill is half of what it actually is) - then they just changed the message to "those darn greedy mega corporations are price gouging you!".

The citizens of this country gave a large middle finger to the gaslighting and bullshittery that was the economic messaging coming from the Biden-Harris administration - and then when Harris failed to enumerate how her administration would be different than the existing one... she was doomed.