WHY IS MANCHESTER UNITED HAVING SUCH A BAD SEASON?

Manchester United ae a very famous club wold over rich with huge fan base world over, but why oh why are they struggling year after year? Mind you they have spent over 700 seven hundred million pounds on buying players, and many ae far to young I would say, and paid big money for very average players. And honestly this Manchester United team does not scare any club big r small gone are those days when Manchester United scored five goals in a single match. I remember Manchester United netting eight goals against Arsenal, I also remember Manchester United netting seven goals against Arsenal . After Sir Alex Ferguson retired in the year 2013, Manchester United should have brought in a experienced trophy winning manager ,and not David Moyes. managers like Fabio Capello, Marcelo Lippi or Carlo Ancelotti . Manchester United have Sold Romelu Lukaku and given Alexis Sanchez out on loan, but failed to replace them. Manchester United be strong in the goal and defence, but it is the midfield that I asking a lot of questions, they do not have midfielder of he quality of say Paul Ince, Paul Scholes , Roy Keane , Michael Carrick, Ryan Giggs and David Beckham. And yes Manchester United do not have a leader like say Roy Keane, but when you have more youngsters in the team you will not get a leader, as all are young , and will listen only to older players. Now with both Anthony Martial and Marcus Rushford out injured where will the goals come from.? And lastly is it correct on the part of Manchester United to put so much pressure on a 17, seventeen year old boy Mason Greenwood to score goals against Arsenal? As he is very young a boy you could say and very inexperienced for such a big match.