Scholes is furious with the way Mainoo has been treated by manager Ruben Amorim since his arrival a year ago.
Advertisement
Advertisement
Amorim has defended holding back Mainoo this season, insisting there are better options ahead of him in United's midfield.
"Bulls***," Scholes posted on social media in response to Amorim's comments.
"The kid is being ruined, not being played in a team that can't control a game of football. Hate seeing home grown players leave but it's probably best for him now, enough is enough."