rub someone's nose in it idiom
揭（某人）的疮疤;不断提起（某人）以前的过失
to say or do things that make someone remember that they failed or got something wrong
Sue failed her exam, so just to rub her nose in it, I put my certificate up on the wall. 苏考试没有及格，所以我把自己的证书贴在墙上，就是为了让她难堪。