得不償失

the gains do not make up for the losses (idiom)

to obtain / to get / to gain / to catch (a disease) / proper / suitable / proud / contented / to allow / to permit / ready / finished

structural particle: used after a verb (or adjective as main verb), linking it to following phrase indicating effect, degree, possibility etc

to have to / must / ought to / to need to

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

to repay / to compensate for / to recompense / to fulfill (hopes etc)

to lose / to miss / to fail