Deutsche Telekom is not even involved here in the slightest. And I am sorry, your reply sounded like you were a employee of Twitch and you might understand why considering the points I have brought up your reply might rub one the wrong way. I apologize for my harsh words, but I can assure you there are no general Germany-wide issues with Twitch (anymore), to my knowledge not even with Deutsche Telekom as ISP.
So are there any Twitch employees reading these forums? I don’t think I should contact Fastly myself, it is not even clear that the Issue is with Fastly or with the server hosted by them (which then would probably be the responsibility of Twitch admins), Or how to report such a issue to Twitch engineers?