成ってない

なって(い)ない【成って(い)ない】

be (woefully) inadequate; be no good; be a failure; be wretched [sorry, poor, sad] stuff; be not up to [fall far short of] the mark; leave much to be desired.

●成ってない言い訳 a lame [poor] excuse.

●この文は全然なって(い)ない. This sentence is complete nonsense [makes no sense].

・あの店は店員の態度がなって(い)ない. The attitudes of that store's clerks leave a great deal to be desired.

・彼は有能な政治家かもしれないが, 父親としてはまるでなって(い)ない. He may be a gifted politician, but he's a very sorry excuse for a father.