As a Man Utd fan I will have no problem walking away from them if this happens and it won't even be that hard.
The last decade has been hard to be a United fan - not because of our on-pitch decline and lack of trophies. That's normal, I can take that, its part of the natural cycle of sport. What makes it hard to be a fan is that we have bloodsucking leeches for owners who will spend the bare minimum to qualify for the CL and get that $$$$, and thats all they're bothered about. Winning trophies is so completely irrelevant to them, literally unimportant (apart from maybe the prize money increasing their revenue by a few more shekels).
Meanwhile, our stadium, one of the finest, most historic, most famous in the world is literally rusting away as they won't spend a single cent on upkeep, let alone rebuilding it or expansion whilst they sit in their mansions thousands of miles away with more money than Crassus, and its still not enough.