The Left's ground game is broken.
While the left historically has had a truly supreme ground game, it was always made up of those voters wholly invested in the civil rights cause and the few well-liked spin-offs after. These were older voters who truly believed the Democrats were the party of progress and love for the citizen.
They were also old as fuck.
Like the Republican pollwatchers, the Democrat Ground Teams have slowly been experiencing more and more attrition through the simple passage of time. And while they have more people to do the low-level grunt work courtesy of colleges, they lack people willing to invest the time to fulfill the management rolls. And it is in those rolls that the strength was realized. The ability to identify key areas that will boost turnout, canvassing large areas ofo Registered voters who have low turnout to convince them to come out, or going door to door to get people registered. That requires a lot of management, a lot of identifying opportunities and acting on them by sending out the grunts.
With the lack of managers though, their ability to actually do that has been increasingly under strain. With no signs of it getting better. Its been slowly building, the issues here extending back to even the Obama era, but has just slowly trucked along with getting worse without any signs of improvement.