The former member, 22, said there was an inability to contribute creatively to the music, reported E!Online.
"There was never any room for me to experiment creatively in the band. If I would sing a hook or a verse slightly R&B, or slightly myself, it would always be recorded 50 times until there was a straight version that was pop, so they could use that version," he said.
"Whenever I would suggest something, it was like it didn't fit us. There was just a general conception that the management already had of what they want for the band, and I just wasn't convinced with what we were selling.