yú​shì​wú​bǔ

useless

于事无补 (於事無補) yú​shì​wú​bǔ
useless idiom
providing no help or benefit to the matter at hand; unhelpful or to no avail

怎么自责于事无补

shì zhì , zài zěn​me zì​zé yú​shì​wú​bǔ.

Now that things have come to this, no amount of self-blame will help.

Frequency

Movie subtitles
2.00 per million appears in 1% of films
Written text
0.678 per million

Sources

Definitions
CC-CEDICT