Absolutely prepared to share. I bough quite deliberately from a major global brand because I understand how they operate, for good and bad.I am glad you are happy, but am left wondering why you bought when it sounds like what you want is best provided by a Marriott-owned property rather than one that is owned by individuals? If you are willing to share, I am curious what the benefits of ownership are for you and would also be interested to know whether you have ever wholly owned a condominium? I absolutely understand if you don't want to share, but what I am trying to discern is whether owning at your particular property enables you to access what you want at a price that is lower than what you'd pay on the open market. If that is the case, then none of this applies to you . . . yet.
We were at the point of wanting to buy overseas, but struggling to find a location that we would be prepared to be tied to and we didn't want the work associated with managing a property ourselves or even having to maintain oversight of a managing agent. It is my experience that resorts that are independently owned, and HOAs wider, can develop into a clique very quickly, often dominated by 1 or 2 personalities and very much dependent on the quality of the site manager that they manage to hire. If you are aligned with the clique that is great, if not it can be very unpleasant and that's not the sort of thing that I want to be involved in with my vacations, I had more than enough of that

MVC resorts, like every business, can also be heavily dependent on the quality of the management team and that has certainly been a feature of the resorts I've owned at in the last +20 years, but they at least have corporate infrastructure to deliver a level of smoothing and to intervene, sometimes helpfully, sometimes not. Basically its a model that I am more comfortable with, and the numbers worked and have delivered excellent value and better quality vacation experiences for more than 20 years.
If you are at the point where your ownership no longer delivers your requirements, then getting out is a far better option than fighting the system, unless that entertains you. I most certainly will be ditching my ownership when it no longer serves my needs, having got decades of value from it.
As Sue said above, if you want to limit commentary to a specific subset of TUG members, then you may be better served setting that out in your posts. When you make generalised comments about how MVW/MVC operate, you draw in those who have different experiences to yours and that may not suit your agenda.