Gary Neville believes the Glazers' tenure has hit an "all time low" after Old Trafford was snubbed in the UK and Ireland's joint bid to host Euro 2028.
The five nations have come together as they look to host Europe's elite international tournament in five years time with documentation submitted to UEFA. As part of the process, 10 stadiums have been selected, but Manchester United 's is not one of them.
Old Trafford remains the largest club ground in the UK and has previously hosted the Champions League final and was England's favoured home whilst Wembley was unavailable. However, after years of neglect, the stadium has been overlooked for the Etihad, which is viewed as far more modern and suitable.
There have long been calls for an upgrade with a host of England's top sides renovating or building new grounds. Videos of leaky roofs at Old Trafford have gone viral and the owners' decision not to invest in the infrastructure has now proved costly, with Neville pointing the finger at the Glazers.
He told the Daily Mail : "The Glazer family have, for years, been warned about a lack of investment in Old Trafford. They have overseen a decline for 20 years in which it has gone from being one of the best stadiums in the world to one that can't even get into the top 10 in the UK and Ireland. This is an all-time low. That it is not in the best 10 to host a tournament is a joke."
Neville has long warned that United were falling behind their rivals when it came to their stadium and training ground facilities, but little has been done. "There has been no investment. It is a rusty stadium. This is a dereliction of duty. It is shameful," he added.
The Glazers don't appear to have the capital to invest in the club, hence their current sale stance, as they explore a complete takeover or minority investment.
A major tournament could now take place on home soil for the first time since 1996 - with Old Trafford not utilised. It was among the eight stadiums picked for Euro 96, but will miss out if the UK and Ireland successfully see off Turkey's rival bid.
Two of the stadia shortlisted are not yet build in Everton's Bramley-Moore Dock and Casement Park in Belfast. Wembley is the biggest stadium picked whilst the Principality Stadium in Cardiff, Glasgow's Hampden Park and the Aviva Stadium in Dublin have been shortlisted. Villa Park, Tottenham Hotspur Stadium and St James' Park are the other stadiums chosen in England.
