Given United are now 13 points off leaders Arsenal and sitting as low as ninth, you can forgive supporters for feeling angry, hurt and disillusioned.
But this is the club which stuck with Sir Alex Ferguson despite his poor start to life at Old Trafford and in the summer they showed their faith in Moyes when appointing him on a six-year deal.
It is inconceivable that United will sack him now. Still, that did not stop supporters from demanding his head.
David Moyes has to go, what am I missing, he is the worst manager, never got a good results, doesn't suit our play, has to go #MOYESOUT
— Daniel Prendergast (@DaPren22) December 7, 2013
David Moyes Is the worst manager united have had for the last 25 years — Nicky Ryyy (@MrNicholasRyan) December 8, 2013
This fan took things to an extreme.
I swear on my life I'd sacrifice all the money in my bank account right now to sack Moyes that's how much I hate him
— Larry Fisherman (@Khanye__) December 7, 2013
And there were no shortage of fans calling on the Manchester United manager to put them out of their misery.
Dear Moyes, please do the honourable thing and resign, you're not the 1st small time manager to fail at a big club — SuperMan™ (@HydroStatiQ) December 7, 2013
If Moyes has any pride left in him he will resign now! Yes ppl say players 2 blame but they need a proper leader not a manager with L plates
— Dr Tammi (@maNkomo16) December 7, 2013
David Moyes needs to resign tonight. Not tomorrow. To hell with those idiots saying the club should stick by him. That time has passed. — Calvin Emeka Onwuka (@CalvinEmeka) December 7, 2013
Moyes please resign You're cursed . We don't need average people like you. Respectfully resign nd don't destroy what you didn't build! Tnx
— #TeamUnited (@divinetomiwa) December 7, 2013
I sincerely think ManU is too heavy for David Moyes. He should better resign. The earlier the better
— RIP Nelson Mandela (@jay_lawson1990) December 4, 2013
Of course, loudmouth Piers Morgan couldn't help but stick his oar in...
United should keep faith with David Moyes. Transition isn't easy - especially from Premier League to Championship. — Piers Morgan (@piersmorgan) December 8, 2013
And Paddy Power's official account had a laugh at his expense too...
David Moyes: Manchester United can still win Premier League title. pic.twitter.com/FXEn64VleL
— Paddy Power (@paddypower) December 8, 2013
Celebrity Spurs fan Lord Sugar is, like Morgan, notoriously prolific and inconsistent on Twitter, and his wildly fluctuating opinions made for entertaining reading as Tottenham edged past Sunderland 2-1. Jermain Defoe was on the receiving end of a particularly swift U-turn.
Defoe hits to woodwork again. He has been unlucky today . He deserves a goal — Lord Sugar (@Lord_Sugar) December 7, 2013
How many more goals can Defoe miss my old grandmother could have scored
— Lord Sugar (@Lord_Sugar) December 7, 2013
And when Match of the Day confirmed that Stoke's dramatic 3-2 win over Chelsea would be opening the show, one of Rodney Marsh's tweets from November started doing the rounds...
In fairness to the former QPR and Manchester City striker he didn't back down on his promise...
I gave you my word. If someone sets it up I will drive to Stoke & clean the players boots for kids charity... #firstonmotd
— Rodney Marsh (@RodneyMarsh10) December 7, 2013