This could be another reason.
11:20
Di Maria was 'unhappy' at United
A former United translator has given two reasons why Di Maria was happy at the club.
Débora Gomes, told Esporte Interativo
“Firstly, he couldn’t communicate with anyone. And second because he realised the club bought him not because the club thought ‘oh, he will bring titles to us because he is a good player.’ No. Because they simply wanted to sell his shirts.
“This I heard inside the club, the people talking. ‘Di Maria sells T-shirts, so let’s buy him’. So he was not happy.
“Then I realised, after Sir Alex Ferguson left the club, the club lost interest in football. It’s money, money, money. It’s making money and that’s it. So the players, when they try and decide who to buy, they will meticulously say: ‘what will bring more money?’ They are not thinking of bringing joy to the fans. They are thinking of selling.”