I'll bite as an independent: I believe that "they" could have reverted to Clinton(Bill) or Obama's moderate stances in regards to border/immigration and gender/identity politics and maintained a sweeping majority.
If the Democrats had disclosed Biden's decline and held a primary this likely would have sorted itself out.
Can you describe how Harris's policies there meaningfully differed from Bill Clinton's or Obama's?
As a Canadian I strongly felt it was GG to the Democrats when they didn’t run a second, competitive, knives-out primary for VP Harris.
For the second time, the party apparatus coalesced around a candidate who was ultimately trounced by someone wrongly considered unelectable.
Even if it was just theatre in the end, having a dramatic primary where the VP won would have made her look stronger and given her a chance to claw back some of the swing voters.