What has gone wrong for Erik Ten Hag's Manchester United this season?

Manchester United have endured their worst start to a top flight campaign since 1962, losing more than half of the club's first 15 games this season in all competitions. The euphoria hailing Erik Ten Hag as a saviour just 10 months ago when he guided the club to Carabao Cup glory has dissipated into toxicity with the team losing five out of 10 games at Old Trafford for the first time in 93 years. Why has Ten Hag's golden honeymoon turned sour; is it the takeover looming over the club, fixture congestion, underperforming players or the manager himself?