Having just compared the NF and ESC performances for Idealvision, I think a big problem was the staging, particularly the camerawork. A lot of the time, the lead singer had his back to the camera and in the chorus where you'd expect the most passion the camera zooms out.
I think the song was always more inoffensive than anything and while many liked it, I thought it would struggle to be enough people's favourite entry. So it was never more than a borderline qualifier to me.
He also wore a white suit.