Bohui says he reported Mourinho to the club over the language he used, which eventually lead the 20-year-old to leave Old Trafford for NAC Breda.
He told the Manchester Evening News: "It was difficult because I was facing — I'm not going to say abuse — but some unfair treatment by the manager at the time.
"I was getting frustrated by the way he was treating me: some of the words he was using, I felt it was unnecessary and it was something I mentioned several times to the club.
"I rejected the offer[s] because I didn't believe I was going to break into the first team with the way I was treated. They weren't really looking at me."