It is fair to say that the system isn't perfect, but it's functioning the way it was designed

Class certification for the entire United States of those classes of people might be too large. Usually the courts prefer a more narrow class

some people will fall through the cracks in the meantime (and you may not like this answer), but that doesn’t automatically justify expanding judicial authority beyond what Article III or the separation of powers allows

The system without national injunctions is functioning as designed