twist the knife (in the wound)

US /twɪst ðə naɪf ɪn ðə wuːnd/
UK /twɪst ðə naɪf ɪn ðə wuːnd/
"twist the knife (in the wound)" picture
1.

das Messer in der Wunde drehen, Salz in die Wunde streuen

to make a bad situation even worse for someone, especially by reminding them of their failures or weaknesses

:
After he lost the game, his opponent decided to twist the knife by mocking his performance.
Nachdem er das Spiel verloren hatte, beschloss sein Gegner, das Messer in der Wunde zu drehen, indem er seine Leistung verspottete.
She already felt terrible about her mistake, so his sarcastic comment just twisted the knife.
Sie fühlte sich wegen ihres Fehlers schon schrecklich, also drehte sein sarkastischer Kommentar das Messer in der Wunde.