It is hard to put your finger on why he struggles in the bigger matches but that was always a problem for him at Everton and he seems to have transferred it to Old Trafford.
I feel it comes down to a certain amount of negativity on his part. For these matches you need to trust different types of players – extroverts and mavericks – who can change the match with a moment of brilliance.
He has just given Nani a five-year-contract so why the hell hasn't he started a game since? Then you have a player in Wilfried Zaha who has gone out on loan, got a team into the Premier League, come back and is now desperate to prove himself. Well Moyes needs to give him a chance to do just that.
Maybe Zaha is a bit too flashy for Moyes but he should look at the way Sir Alex Ferguson treated Cristiano Ronaldo in his first two seasons.
Ronaldo would often try too many tricks in a match and Ferguson and the senior players eventually got him to tone it down but they did it while he was still playing in the team – allowing him to learn from his mistakes on the pitch as he turned into one of the best players in the world before their eyes.
Moyes just seems reluctant to do that. Look at how well Ross Barkley is doing for Everton this season. It can't be just coincidence that his development has sky-rocketed since Roberto Martinez came into the club.
Moyes only used him in fits and starts and sent him out on loan a couple of times but Martinez has said: 'Go out there and show me what you can do' and he has been one of the best players on the team.
Somewhere along the line Barkley will go through a rough time as he is young and inexperienced but that happens, you have to take a certain amount of growing pains with these young players.
Instead Moyes seems to be sticking rigidly with the same group of players, some of whom don't deserve to be in the team. I can't see why he keeps selecting Ashley Young for example. People have been upset with his diving antics but for me the problem has been that he just hasn't been good enough in a United shirt to merit a regular place.
As an ex-United player I was quite optimistic going into the City game after the performance against Leverkusen but I was letting sentiment rule my head.
That Leverkusen team were poor - not the same side that finished third in the Bundesliga last season - and the big problem for United is not only does the City result hurt them it offers up a huge boost to their neighbours across the road.
City have been average this season, as average as they have been since all the money came in, but now Manuel Pellegrini has that big victory under his belt, you could see them pushing on.
Moyes has been criticised for playing the same players three times in a week. I don’t have a big problem with this as I think continuity in certain positions is good for a team, but you have to identify when certain players are not up to it any more and it is definitely time for Moyes to shake up the team.
That's what Sir Alex Ferguson always used to do – he always had his entire squad on their toes always needing to prove themselves to earn their spot.
Moyes won't want to be told how to manage, but there is nothing wrong with copying the blueprint of the man who went before him when it worked so well.
The centre-back partnership of Rio Ferdinand and Nemanja Vidic has just not been working recently. United need somebody younger, with more pace back there, who can sense danger when it is coming.
Some of the defending against City was awful and the problem in recent games is that United have always looked like conceding whenever a team comes forward. I'm not sure Phil Jones or Chris Smalling are the answer, as much because they always seem to be injured as anything else, so they might have to spend money on a quality defender in January to fix this problem.
Patrice Evra is another concern – it is all very well having a full-back who is great going forward but your number one job still has to be defending. Players keep getting in behind him down United's left side.
Liverpool in the League Cup now becomes a massive game – it is as big as the next Premier League or Champions League game given who it is against and what happened at the weekend.
United need to stay in as many competitions as possible to give players a chance to play and stay fit. This is not a match where Moyes can just put out the reserves and be happy to be rid of the competition.
United and Liverpool could never organise a pre-season friendly because there would be nothing friendly about it - the rivalry is so great.
It is already looking like a must-win game for United and Moyes because the heat will really be on if they lose to their two biggest rivals in the space of a few days.