it's not that
Ce n'est pas si compliqué que ça.
It's not that complicated.
Ce n'est pas si grave que ça mais c'est bizarre.
It’s not that serious, but it’s weird.
— Audition (2000)
It's not that deep.
It's not that cheap.
It’s not that unusual.
Ce n'est pas si ridicule que cela.
It's not all that ridiculous.