It's 'useless' trying to change her mind. = It's 'useless' to try to change her mind.
Drugs are 'useless' in treating the condition.
I made a 'useless' attempt at fixing the leak.
(..) is gonna tell the guy in the $ suit... how to run the business. - Come on. - I know. Maybe we're better off... with me being businesslike and you being the good-time, useless party guy. - It got us this far. - Mm-hmm. And I must say that I miss the laughter. Oh, God, how they used to laugh with me. (..)2004 TvShow: Arrested Development Title: Afternoon Delight Season: 2 Episode 6