だめじゃなかったです
駄目じゃなかったです
damejanakattadesu

Noun
Desu Copula
na-Adjective
Interjection

The polite, past negative form of だめ

1. Wasn't bad.; Wasn't a problem.; Wasn't impossible.; Wasn't unacceptable.

Past/Perfective
Negative
Polite
Casual Register
Go
Usually Written in Kana