"I think there is a stage in your career when you need to start winning," the midfielder told Arsenal.com.
"Here at Arsenal is all about our development so my time at Scunthorpe was valuable. It's different to the youth team because in League One they're fighting for their lives and their careers.
"I think the move changed me as a person. I have come back a stronger player and I want to win every game that I play in.
"It's good experience to go through those ups and downs, getting shouted at, getting moaned at. You learn to take it on board and get a thicker skin."