Pressure is intensifying on Amorim with United sitting 14th on the Premier League table after their opening four games.
Speaking at the 40th anniversary of the Association of Manchester United players gala, Wilcox said, with his interview shared on the Man United the Religion's YouTube channel: "I just pray that we get the opportunity to turn it around and I really feel that it's not will we win again, it's when we'll win again.
"It has been a rollercoaster! I came in last April, around 18 months ago, and it's been a real challenge I can't lie."
The former Manchester City youth chief added, "I thought the club was in a much better place than it was. We had no football identity, we lacked alignment between ownership, the CEO, football and the academy and we've just been working so hard behind the scenes."