Trump should have emphasized more the Project Warpspeed that cleared out so many of the regulatory hurdles to get the vaccines so quickly. Obama / Biden / Hillary would have done a govt led initiative that would have been as effective as the healthcare dot gov website was.
He's kind of trapped. Trump: "Our bureaucracy would have taken forever, I cut it" Replies: "They keep us safe from dangerous drugs" "It's your bureaucracy, you should have fixed it in a few months", etc.