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.
(..) Hold on, please. # Mr Wu, what shall I do? - Oh, Christ! - Telephone, sir. - Who is it? - Outside line, sir. Someone rough. Sir? - Hello? - 'Your gearbox is bust, sir.' Damn it, can't you fix the bloody thing? 'Can't be done, sir. (..)2011 Tinker Tailor Soldier Spy