Around this time of day, I can't even launch in a simple match of Control in Destiny 2; as the lobby fills up and the match is about to be launched, I get the error. Earlier in the day, I can play 4 or 5 matches before the same error shows up.
This behaviour appeared as Marathon server Slam launched, then subsidized somewhat when the server Slam ended and lasted until Marathon launched. Now, it happens every single day: I had already posted about this problem a few days ago in fact...
Using UPnP, Stun Test is Open, testing server like Centurylink in Spokane shows no Internet problem, no packet loss, no Jitter. Verified game files, cleared Steam download cache (by the way, the same behaviour happens using Epic launcher and game version) and also DNS cache.
Link to video (not that it's interesting, but shows what happens, in loop) https://youtu.be/ojazfIBkQgU