So much the worse for you!
Examples
You didn't study and you failed your final exam: so much the worse for you! 
Non hai studiato e sei stato bocciato, peggio per te!You chose to do that, so much the worse for you!
Tu hai scelto di agire in questo modo, tanto peggio per te!If he relies on incompetent and ambitious people, he'll be worse off!
Se si affida a persone incompetenti e opportuniste, tanto peggio per lui!