He was much younger then in Jan 2013, only just turned 20 years old. A Man United mate of mine said that it was too big a move for him at too young an age.
Some players can deal with the spotlight and the change of environment, some can't. Then Moyes didn't play him and he went on loan a year...
Zaha wanted away in the summer, but the sale of Wan-Bissaka to Man United for £50 million brought in enough for Palace to keep hold of him.
Fair play to Zaha - after the disappointment of not being able to further his career elsewhere, he's knuckled down and has weighed in with the goals...