まあまあではありませんでした
mā mādewārimasendeshita

Desu Copula
na-Adjective
no-Adjective
Interjection

The polite, past negative form of まあまあ

1. Wasn't so-so.; Wasn't mediocre.; Wasn't passable.

Past/Perfective
Negative
Polite
Formal Register