If I may use your response as an example of why the OP has some good points:
The suggestion of giving constructive criticism and leeway, you call ‘blind faith’.
To support the players is to you ‘lack of ambition’.
To give extra leeway and opportunities to local youngsters, aka The Matt Busby Method, to you ‘makes no sense’ and is ‘nationalist’.
In effect, to you the connection with Manchester means nothing extra, the players are just tools for you to fulfil your personal ambition, and having faith in the lads is to you a threat of robbing you of your success.
From what you call ‘the club’, you subtract the area Manchester and it’s people, the tradition as laid down by i.e. Busby and Ferguson, the players, coaches and staff doing the actual work and play, and what remains is effectively only you and your idea of the brand MUFC(tm). All the others are really against you, a problem to be solved.
I think the OP is right, that is not ‘supporting a club’, you are not actually supporting it in that way. Rather using it for your own means. I think it more fair actually if individual fans rather thought of themselves as more expendable than the coaches, players and staff. A collective of supporters is not expendable. Individuals who don’t support, are.