Really? Which listed benefit of the Rewards Program did you not get?

I think that you have read other promises into the program such as maintaining certain levels of exclusivity at each level, and that Marriott won't give status through any other means. However, these are not Marriott's promises.

Platinum status is Marriott's to give to others as it sees fit. Your part of the bargain is whether you believe the Marriott status is worth it to you.