@uberwaltz
Okay, we are narrowing down the options. After you have your ISP check your line speed, assuming it is okay, I suggest you email Tidal, again, and ask them. I suggest you include in your email all the steps you have already taken to solve the issue.
I know that Tidal has 5,000 MQA Coded albums but my Aurender only displays 500. I complained to Aurender but they report Tidal only codes 500 of the albums as MQA. Based on your post above, I will email Tidal about these missing MQA Coded Albums. I agree this is very frustrating.
My Aurender only supports Tidal and QoBuz. Qobuz is expected in the USA sometime in the summer. I have no experience with it but have been told it is uncompressed and very good. I have no experience with the other services you listed.