rub salt in the wound

Translations
сыпать соль на рану
Losing the match was bad enough, but hearing the coach's criticism rubbed salt in the wound.
Проиграть матч было достаточно плохо, но услышать критику тренера было как сыпать соль на рану.
Definitions
To make a painful situation even worse by reminding someone of their misfortune or by adding to their distress.