I think the actual quote is "You have failed this city". It probably means that he wasn't able to do something that he tried to do for the city.
Interested in Language
What does the sentence mean?
You are failed on this city.
I quoted it from "Arrow".
It makes no sense.
I'm not a teacher, but I write for a living. Please don't ask me about 2nd conditionals, but I'm a safe bet for what reads well in (American) English.
Do you mean the sentence makes no sense?
How can I make it correct?
You mean becoming a hero, protecting the city?
If you want us to help you, Polyester, you need to take more care with your information. You misquoted the words and got the name of the show wrong!
Remember - if you don't use correct capitalisation, punctuation and spacing, anything you write will be incorrect.