What did Bryan Singer got it wrong for Superman Returns where Nolan got it right for

I mean Superman Returns sounded promising at first but unfortunately Singer relied too much on fanboy love of the first 2 movies rather than being it's own movie with it's own identity as it was a sequel to a 28 year old franchise that died in 1987. Now Nolan knew what he was doing with the Batman series, he decided to discard the 1989 to 1997 movies out the window when he rebooted Batman on the big screen for the modern 21st century audience and made something fresh with his series.

Singer has regretted not rebooting Superman for today's audience.