恨鐵不成鋼

lit. disappointed that iron does not turn into steel (idiom) / fig. frustrated with sb who has failed to meet one's expectations

to hate / to regret

surname Tie

iron (metal) / arms / weapons / hard / strong / violent / unshakeable / determined / close / tight (slang)

no; not so / (bound form) not; un-

won't do / unable to / (at the end of a rhetorical question) can that be?

surname Cheng

to succeed / to finish / to complete / to accomplish / to become / to turn into / to be all right / OK! / one tenth

steel