Manchester United manager Erik ten Hag has criticised the club's transfer business since the departure of Sir Alex Ferguson.
The Red Devils have been one of the Premier League's biggest spenders in the last decade, but have only won three trophies since Ferguson retired in 2012.
Ten Hag is currently overseeing another rebuild after last season's disappointing campaign, where the club finished sixth with their lowest-ever points tally of 58.
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"Manchester United didn't exactly have the fear factor last season," the former Ajax tactician told reporters, as per Goal.
"There was no spirit. I saw no team dynamic in the squad. The mental resilience was very low.
"I saw that as an outsider - and also noticed it in my first weeks at the club. I looked at the culture of the club. I asked 'how did Manchester United become great?' And for me, it was about Sir Alex Ferguson.
"His teams excelled in togetherness, collectivity, spirit. You just couldn't beat them. When we get players, you look at their quality and technical skills.
"But you also look at their mental quality, that mental resilience - and we had to bring that back. Most purchases have been average - and at United average is not good enough. United's shirt weighs heavily. Only real personalities, who can perform under great pressure, can play here."
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