The crosstabs gang can only complain because there's nothing to celebrate about. Casey/Brown/Gallego all up, yet Biden is almost always down. The fact they allowed him to run again is nothing more than straight incompetence and cowardice.
The percentages are so low because both candidates suck. 2016 was no different and I expect a similar result.
The Democrats are probably better off long-term with a split result like that anyway. Trump with a Democratic congress or tied Senate would be handicapped at the knees off the bat. A second Trump term with him approaching dementia is going to be bad. Really bad for the GOP’s electoral prospects. Trump will have been the face of the GOP for over a dozen years, and that will probably cause irreparable damage to the GOP’s brand among those under 50 as the Boomers die off.
I wouldn’t say Trump is approaching dementia. He already has moderate dementia and if that recent Vegas rally and Capitol Hill meeting are any indications, he might be falling off the cliff as we speak