I get what you saying, im on the same no spending boat, and because of that i know i have zero power in their choices, i accepted that.
I been very critic of GMs in the past. Some of those for good reason but do you really think that every single one of the GMs, or whatever you want to call them, came to this world with a speech of helping the community and now they ignore you and are feeding the wrong information to whatever is in charge? Do you truly believe they changed completely in a matter of weeks? Because they all changed like that!
Clearly they are giving the right information to management, they are just ignoring it because, as long as they hit the value they target for the year, they know they don't need to change a single thing to their plan. Doesn't matter if the plan is good or not, they won't change a thing. As i said, the only feedback that counts in this game is the money paying customers spend in this game.
And finally the gms, it is very clear why they are ignoring everyone... they don't have an answer to the issues you face them with. How can they reply to you if they present the feedback you gave him to the management (AKA NC Korea) and they completely ignore it? What could they possible reply to you that makes you satisfied and at the same time won't get him fired? The answer is nothing!
You want changes? you have two options, one: be an american citizen with money and present a case in court on their shady game practices, two: convince the top spending players to not spend the game for some time in this game.
Good luck with both.