The Glazer business model has two problems - one fundamental and one not so much.
The fixable one is that they have been running the club for short term commercial profit and have been basically indifferent to on the field results until it started to damage the brand. They now seem to be doing something about that, albeit the proof of the pudding has yet to be eaten.
The unfixable problem is that we are in the same league as clubs that either don't care about money (City, Newcastle) or else are willing to put football first (Liverpool). Without new owners it's hard to see us ever winning big silverware consistently. Liverpool don't even do that under Klopp.