The Dutch striker, who signed for Turkish giants Fenerbache last week, claims that he would have been happy to remain at Old Trafford and fight for his place, but it became clear to him that he wasn't involved in an 'honest battle'.
After being left on the bench for April´s crucial match against Chelsea, van Persie began to sense his time at United was coming to an end.
Speaking to the Sunday Times, the former Arsenal captain said: "I asked to play in the reserved, to get my minutes, but after was on the bench again. The atmosphere changed between me and Louis and people at the club saw it, but I always remained professional."
Having convinced Van Gaal during his time with the Dutch national team, Van Persie was determined to once again convince his manager of his qualities but feels he wasn't given a fair chance to perform.
"When I came back. It wasn´t an honest battle anymore. Fighting to get back in the team wasn´t given to me as an option. He was sending me to Pitch Two, and I´m a mature player," he added.
"I´m not stupid, I didn´t get angry or emotional. These things are part of football, part of life. You have to make the best out of any situation so I´m doing this by moving on."