I just had my first hatch and I have one that has this same problem. I know now that i should have helped him out sooner but I didn't know what to do. I guess I need to put him down but I sure hate the thought of having to do that.
That's part of life.
If you continue in the bird hatching arena you will have your fareshare of culling.
Most chicks that have a hard time getting out of the shell will not make it past the 3rd week, even helped by human hands, if they are even that lucky.
Steve
Pheasant Hollow Farm