Are the characters in Anthem too idealized to be believable?

If taken out of context, the characters, yes, could seem a bit too idealized to be believable. However, the characters in any story should be considered on par with all a story’s literary elements. For instance, the story takes place in the distant future after a great war where there is a great deal of brainwashing of people that has taken place. With all that in mind, it is understood that pretty much anything can be possible, which makes the characters-as idealized as they may seem to some-all the more believable.