Is this a serious post, or just something to provoke a certain reaction? There are so many threads and posts that cover this already. Available at check-in is at the discretion of the hotel, as you posted, "Upgrades are subject to availability and identified by each hotel." The hotel said no, so that's the end of your request. It does not include blocking a suite, which can be sold, for five days. Especially for a Gold, which is below two or three other tiers.

The only thing that makes you entitled to get a suite is to reserve and pay for a suite.