United went into the clash in West London needing to improve significantly after a poor performance in their first outing of the season.
Meanwhile, fans are also furious with the owners and the lack of effective decision making when it comes to transfers.
United lost several players over the summer, and while there have been some signings, the Red Devils have not landed their prime targets.
Erik Ten Hag needs more help in the way of additions, and in the meantime, his current stars are struggling to get to grips with his style.
While there were encouraging signs in pre-season, United have looked poor this season, and that continued on Saturday, and within 35 minutes,United were four goals down against Brentford.
David de Gea spilled a Josh DaSilva shot into the back of the net within 10 minutes, and Mathias Jensen added another eight minutes later after a calamitous attempt to play out from the back with a goal-kick.
Ben Mee then forced home a third from close range, and some brilliant and clinical play from Brentford resulted in Bryan Mbuemo making it four.
United had never previously been four goals down within 35 minutes in a Premier League game, and Sky Sports commentator Neville was not impressed.
In a simple eight-word assessment, the United legend said on commentary: “It’s like a men’s team against under-nines.”
That encapsulated United’s first-half performance pretty perfectly, although Brentford were excellent and Neville was very complimentary of the Bees.