"Ce téléchargement prend trop de temps, j'en ai marre."

Translation: This download is taking too much time; I'm fed up with it.

[LadyStacey]

So then how do you say just "I'm fed up" (without the "with it")?

[Louradour5]

You can say the same way.

[JennyRusse1]

Or possibly - j’en ai ras le bol. I think French requires the ‘en’ though English doesn’t necessarily require ‘with it’.

[DF-]

Does "J'ai marre" mean I'm fed up, and the "en" is used to refer to the download from the previous sentence?

[Linda913103]

I agree "i'm fed up" implies with something so "with it" isn't needed.

[JohnnyB809998]

"....is taking too long" would be much more common.