I think you will find that under the Glazers, we have probably spent more than any other club on transfers during that time. It is just popular to bash the owners for not spending, but that is not where the true blame lies.
Firstly, we had no structure at the club, which I would blame Woodward for, as we should have had continuity. If one manager wants to play possession football, the next more defensive, counter attacking style, and the third doesn't have a style or system, then players from one manager are not suited for the next one. That is why we wasted money. Woodward was supposed to be managing the club (not the team), and he was a disaster, so I guess the Glazers can be blamed for keeping him in a job for so long). Then the managers were to blame, and finally many of the players have massively underperformed. I don't blame players like Mctominay, who has his levels and he aims to give his maximum every game. Arguably he is not Man Utd quality, but that should be the manager's call. The players who don't give their all, and who cause trouble, like Pogba, Henderson, Greenwood and Ronaldo, they should hang their heads in shame.
Obviously the period of Glazer ownership will not be fondly remembered by most fans, but a big chunk of the blame lies elsewhere. Asking for a transfer in public just before a big game, or bad-mouthing the club is indefensible, and none of those four players should ever play for the club again. The incident this week shows how these things should be managed, with the manager punishing Rashford, and he responds in the best way possible, accepting responsibility and scoring a goal.
I don't really get the fan obsession with the Glazers. Since Fergie retired we have had a rubbish CEO and rubbish managers. As soon as we have got a new CEO and a good manager, things are looking up. We spent a fortune in the summer, and bought players the manager wanted. Since the Brentford game we have outperformed Man City, and would only be behind Arsenal, who have lost only one game so far this season, to us.