Former Manchester United captain Gary Neville has insisted that the Glazers "are responsible" for the team's issues in the early stages of the 2023-24 campaign.
The Red Devils have now lost three of their opening five matches of the new Premier League season, having suffered a 3-1 home defeat to Brighton & Hove Albion on Saturday afternoon.
Man United are 13th in the table, already nine points behind leaders Manchester City, and they now face a trip to Germany to take on Bayern Munich in the Champions League.
Neville has once again blamed the Glazer family, claiming that the American owners "set the culture of greed, ill-discipline, indecision and uncertainty" at the club.
Last November, the Glazers signalled a willingness to enter into talks over a sale of the 20-time English champions, but they remain in charge almost a year on.
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"I've just got back from Old Trafford and you always have to be optimistic pre-match but the most concerning thing is what we ended up watching wasn't a surprise," Neville posted on 'X' on Saturday.
"This wasn't a lack of effort or a group of players not interested. This was a team well-beaten by opponents that were well drilled and knew what they were doing. Simple as that.
"Oh and yes the Glazers are responsible. It's how it works. You own a business and everything good and bad sits with you! They inherited the best in all areas. They've overseen 10 years of mediocrity off the pitch and on the pitch.
"They set the culture of greed, ill-discipline, indecision and uncertainty that runs right through the club. It would be best if they sold the club with some speed and efficiency and allowed at least the off the pitch items to be corrected properly that re-set the tone and culture.
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"Football is volatile so results on the pitch can be erratic and cyclical but if the off the pitch stuff including the owners direction and leadership are spot on it gives you a better chance to succeed on it."
Sheikh Jassim bin Hamad Al Thani and Sir Jim Ratcliffe remain the favourites to purchase Man United, should the Glazers ultimately agree to a sale.
Recent reports have claimed that the Glazer family are considering taking the club off the market, but both Sheikh Jassim and Ratcliffe are thought to be remaining patient in their attempts to complete a takeover.
Man United will follow their game against Bayern with a trip to Burnley in the Premier League, before hosting Crystal Palace in the EFL Cup on August 26.