I disagree that “flatten the curve” was really a goal. It was a rationalization of why we needed restrictions for a disease that is, after all, very mild for most who contract it.
People decided that when we flattened a curve we’d be done with restrictions, not understanding that lifting restrictions too much would result in having to flatten the curve again, and again, and again. That’s what we’ve been doing until vaccinations start hitting the streets.
Likewise I don’t understand how anyone could honestly pretend that “take delivery of vaccines” was an endpoint. People were observing since April that we were missing basic stuff like a billion syringes! Do folks think they’re safe just because a hundred million doses of vaccine is in a warehouse somewhere?
Some folks are just going to be mad forever about this, and those people are going to claim that the goalposts are always moving and nobody knows what’s going on. That’s just how people are.