"When I look back now I am just smiling because it was a big lesson for me," Onana told MUTV. "In the beginning I was like, 'Wow, did I make the right choice?' but I'm definitely 100 per cent sure I made the right choice because Manchester United is the biggest club in this country and one of the biggest clubs in the world.
"I hope I have the answer but football is not like mathematics, one plus one is two.
"It's not always the best players who win, there's always a lot of ups and downs, you just have to deal with the situation and we have to deal with the situation.
"We have faced a terrible season, for me, personally, and as a group as well. I don't think my teammates are happy with the situation we are facing. I know them, they are all winners, everyone wants to win, before the season we spoke about fighting for every single title.
"Things happen in life and you have to deal with the situation. We have a beautiful final to play and another few games to play so we will go for it."