Translation of "Calificativo" in English

Que les ha valido el calificativo de la “pequeña Esparta”.

that has earned them the qualification of the "little Sparta".

“Incompetentes” es el calificativo más suave que se les puede aplicar.

"Incompetent" is the softest word usable to describe them.

Desde luego, tal y como habéis visto razones para alcanzar ese calificativo no faltan.

Of course, as you have seen reasons to reach that qualifier they are not lacking.