The three-quarters empty away end with ten minutes remaining told it’s a sorry story as far as Manchester United and Ruben Amorim are concerned.Even the loyal match-going United fans who have regularly serenaded Amorim with songs about how the Portuguese will ‘bring the glory days again’ must surely be starting to run out of patience with their under-performing manager.Amorin has overseen United’s worst Premier League stat in 33 yearsGettyTen months after replacing the floundering Erik ten Hag, and having spent £240million on shiny new signings in the summer, there are no real signs of progress.United were outclassed by Manchester City at the Etihad on Sunday, with the Citizens barely having to get out of second gear to ease to a 3-0 win.And as a result of mustering just four points from as many games, United have made their worst start to a Premier League season since the 1992/93 campaign, when they needed the signing of a certain Eric Cantona to inspire them to a first championship in 26 years.Sadly for Amorim and those suffering travelling fans, there is no Cantona on the horizon this time, and certainly no league title any time soon.Instead, Amorim was left to endure taunts from City fans, in between breaking out into a stadium-wide Poznan, of ‘You’re getting sacked in the morning’.Meanwhile, several of Amorim’s expensively-assembled squad continue to struggle in the system he seems determined to live or die by.Patrick Dorgu’s indecisiveness in cutting out a simple pass in the build-up to Phil Foden‘s brilliant headed opener exposed the Dane’s lack of Premier League quality.Dorgu regularly found himself in promising crossing positions, but lacked the ability and composure to find a killer ball, and on more than one occasion, he struggled even to stay on side!Luke Shaw’s inability to match the excellent Erling Haaland for brute force for City’s second highlighted him as a left-back being shoehorned into a back three when still clearly short of full match fitness. Amad Diallo, United’s main shining light in a dismal campaign last season, seems to suffering from an identity crisis and no longer knows if he is a winger, wing-back (right or left take your pick) or a No.10.Amorim’s side have picked up just four points from their opening four top-flight fixturesGettyUnited are yet to get to grips with fully understanding Amorim’s systemGettyThe most damning evidence of all that Amorim’s inflexible 3-4-2-1 formation is failing comes in the form of captain Bruno Fernandes.Fernandes is wasted playing in a deeper lying role and once again cut a frustrated figure as City tore through United’s overwhelmed midfield.After seeing Fernandes struggle so badly in that position in United’s limp Europa League final defeat to Tottenham Hotspur in Bilbao, Amorim does not appear to have learned any lessons.And it’s not just the system that is hampering United, but some questionable team selections too. While chucking new goalkeeper Senne Lammens straight into a Manchester derby would have been a bold move, it would surely not have been any more risky than sticking with Altay Bayindir, whose nervy displays appear to have negatively impacted the defenders in front of him. Amorim and the United board should have addressed their obvious problem between the posts much sooner than they did in the summer.Amorim’s Premier League record at United is a sorry state of affairsWhat has Ruben Amorim said about his system?Pressed by talkSPORT’s chief football correspondent Alex Crook, Amorim was asked whether he would change his system.Though he roared there is nothing wrong with it, as he said: “The system is not the problem.“You are here, and you saw Manchester United playing with a different system. Most of them, 4-3-3, and [it] was more or less the same result.“I will try to do my best in the way I see the game, I don’t see the system as you guys see the system, so I will try to do my thing.” Commenting on whether Fernandes is being wasted in a deeper role, Amorim remarked: “I don’t agree.“Because in front he has Amad [Diallo], he has also Bryan [Mbeumo], you have [Benjamin] Sesko, and then Amad goes to the side.“We could have [Matheus] Cunha, we could have Mason [Mount], so I don’t agree with that.”If only there as a stopper of the class of Gianluigi Donnarumma going on the cheap! Then there is Kobbie Mainoo, once a beacon of United’s historic academy, now restricted to a bit-part role and who has become so disenchanted that he tried to force his way out in the transfer window.Amorim can rightly point to the impact of summer signings Bryan Mbeumo and Matheus Cunha as reasons to be positive. But his overall record and over-reliance on the tactics that served him so well in the inferior Portuguese league will leave many United followers fearing another miserable season.