You are describing the exact same problem that I have since a few weeks!
While I still have to test a little more to be sure if this solved my problem, I can give you the following hint already:
Your ISP might restrict the connection speed with sexlikereal.com.
I am in Germany and have a contract with Vodafone. Yesterday I bought a VPN and side loaded the .apk of the App to my Oculus Quest2. First test: fast connection. No video stuttering.
The same effect was noticeable with my Laptop and a browser download. While I often only got 1-5MB/sec in the past weeks, directly after activating the VPN I got 30MB/sec!
I am using NordVPN in case you are wondering.