Other than SSR, all the resorts are sold out and essentially owned by the members. DVD, not
DVC, retains a small percentage reported to be in the 2-4% range. I'd think 2% would be the min just to cover the units out of commission, so those units would generally not go to the public. Most timeshares only sell 51 weeks per unit and keep a full week to do maint and even that is not always enough. Unit assignments groups should be home resort, other DVC members, cash rentals, exchangers; in that order. Owners at that resort should get priority, period.
Remember that at resorts that are not sold out, only a part of the resort is actually available to the members. OF course DVC has to decide how to allocate the unit assignments, but for sake of explanation, they could easily have this room for DVC members and that room still owned by DVD and thus for cash rental. More realistically it's probably done by number of rooms rather than a line of tape down the hall but the end result should be the same.
As for HC units, I believe one can dislike them intensely without being in any way derogatory to those that need or want them. As I've said before, I'd rather stay home than have one, and I meant it. Would I feel differently if I, or another member of my clan needed one, of course I would. The attitude that one should just accept the room, like it, and be glad you don't really need it, is unacceptable to me. Of course I'm glad I don't need it and that it's there for those that do. And I know that DVC must use them at times for those that don't need them because their in the mix and they only have so many units and the resort is sold out. But the absolute minimum is they should be honest. If you request a non HC and they assign you one, they should tell you, PERIOD. If you ask and they don't own up, they should be fired on the spot. If they are dishonest to me, they will be starting another thread about DVC members abusing the CM because I will be talking to every manager in the place. If they tell me honestly and nicely it's a HC room and it's all they have and I believe them, I can live with that though I wouldn't be completely happy.
And having a supervisor or manager spouting behind the scenes but where you can hear and see them, and without acknowledging or interacting with the customer is simply beyond wrong. A formal and written complaint in addition to a visit to let the GM of the resort to let them know is the best approach. But I'd start by telling her directly how inappropriate I thought she was.