Her failure to articulate her platform is her fault.

The words chosen by the Harris campaign, and the platforms on which they were spoken, left 15M - 20M people at home, and flipped a bunch more from D to R.

The media definitely didn’t learn that competing for horse-race viewers at the cost of all else gives Trump a large advantage. They all talked about that lesson in 2016, but didn’t really learn it. Clearly, given how they behaved.