He's 'having a rough time (of it)'. = He's 'going through a rough time'. [=he is having a difficult time; his life has been difficult recently]
The project still has a few 'rough edges'. [=the project still has a few things that need to be changed or finished]
Don't 'be so rough on them' [=don't punish or criticize them so harshly] for making a mistake.
(..) Gronckle head on a spear! What a feeling! You really had me going there, son! All those years of the worst Viking Berk has ever seen. Odin, it was rough. I almost gave up on you. And all the while you were holding out on me! Oh, Thor Almighty! With you doing so well in the ring... (..)2010 How to Train Your Dragon
(..) - We're throwing a party to celebrate! - Come over here. - Hurry! He's gone? Most afternoons, but who can blame him? The life of a celebrity's rough. He can barely walk through the village without being swarmed by his new fans. Hiccup? Who would have thought it? He has this way with the beasts. (..)2010 How to Train Your Dragon