"I don't know whether if I stayed again, I'd be right at the bottom," Ledger said.
"I'll be right at the bottom at another club as well but I just felt it went a bit stale and the best thing would be to get out and start somewhere fresh.
"Mentally, it's better for me to do that [rather] than banging your head against the wall again.
"That's what I felt and maybe it's slightly illogical but that's just how I felt going forward."