Elaborating without doxxing myself too much: I know for a fact that each battleground state had programs to reach every college student on every major campus in these states. Several million $ went into canvassing efforts per state to get college students out to vote. Whether it actually worked...
They still had a 1.5 BILLION $ war chest and that's not counting all of the Dem-aligned orgs that also campaigned for Killer Kkkamala. They can't complain about a lack of funds when they outspent Trump by this much.