Meh, people think of things way too black and white with the vaccine. The unrealistic expectations were certainly raised because of the first two vaccines but the idea was never going to be eradication despite what people might have implied. Prevention of severe illness, hospitalizations and most important of all death was the number one concern. Variants were going to arise because of the high spread and global conditions, which means new variants were always going to be introduced to the United States.
Media hype and optimistic naive people- everyone in the US will get vaccinated and never need to think about coronaviruses again
Realistic- welcome to a new circulating virus that will never be fully controlled, will enter some type of seasonality like the flu, kill 30-40,000 in the US every year, you will get a covid vaccine to go with you yearly flu shot.