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.
(..) Catch you on the way back? Unless... You die. The troll tree. Bergen town. I ain't happy I'm feeling glad I got sunshine in a bag I'm useless but not for long the future is coming on I ain't happy I'm feeling glad I got sunshine in a bag I'm useless but not for long the future is coming on (..)2016 Trolls