es totalmente inaceptable

is totally unacceptable

→ ser
phrase Rare #45,115
is totally unacceptable Used to strongly reject or condemn something. The subject can be eso, esto, a noun phrase, or be omitted when understood from context.
SP: Este trato es totalmente inaceptable.
EN: This treatment is totally unacceptable.

Y es totalmente inaceptable.

And that is totally unacceptable.

— Senna (2010)

Eso es totalmente inaceptable.

That is completely unacceptable.

Su petición de abandonar Berlín es totalmente inaceptable.

Their request to leave Berlin is completely unacceptable.

— El hundimiento (2004)

Esto es totalmente inaceptable.

This is completely unacceptable.

— Titanic (1997)