The Scot's succession to Sir Alex Ferguson's trophy-laden years was an overwhelming disappointment as poor results blighted his short spell at Old Trafford, resulting in a seventh-place finish which was United's worst of the Premier League era.
However, Moyes maintains the club should have had more faith in him.
"I got the job and I expected it to be a six-year plan
I signed a six-year contract..
disappointed it didn't go to plan," he told the BBC.
"I expected to be given an opportunity to fulfil that and it wasn't what was expected.
"It was really difficult when I lost the job initially because I didn't really see it coming, even though I had been losing games.
"I knew that it could be difficult but I joined a club that I felt stood behind their managers, made sure they supported them in difficult times - Sir Alex had difficult times when he first took over.
"I do understand that the landscape has changed a little bit in football but I think that United always stood for the right things and I expected them to do what was right with me."
Despite the chastening experience Moyes is looking to get back into management when the right job comes along, after turning approaches to speak with other clubs in the intervening period.
"I have enjoyed the time off but I have got to wait on the right job and make sure it's one that I want," he added.
"I would never have left Everton for anybody but an ambitious football club and I thought Manchester United would have given me that opportunity.
"It didn't materialise that way so I am hoping that the next club I join gives me the chance to build a team, because I think that is what I am good at.
"I've had several people contact me about jobs
None of them have turned round and said 'here is a job it's yours'.
"But people have asked me if I have had any interest in jobs
The clubs that have come calling, I just felt that they weren't right."
Source : PA
Source: PA