Same problem !

In Deutschland das selbe Problem, seit gestern kommt man nicht ins Game !!!

Same, for most of the day it's been nothing but "Game Creation Failed. Your game could not be created. Please try again later" :(

I can connect and play for a couple minutes then i get disconnected

As of today,
You might need several attempts to get online. Don't give up or try change server.
Same goes for creating a game.
Haven't manage to get multiplayer yet. Mostlikely not worth trying until situation is more stable.
GL&HF

As it for me - I've played beta version for more that one week. Everything was ok. I agree that there was only offline mode. Once, the full game was released I found all changes very encouraging. I play the game in offline mode and as so far - everything working fine for me. Unfortunately, online mode should be available for more than a day. At the beginning I wanted to defend programmers. I am a programming specialist myself. Unfortunately, I think they were completely unprepared for the upcoming success of the game and could not cope with the task. All we need to do is wait patiently until the programmers will made appropriate changes in software, that made this game playable. One could only hope.

Honestly they should've done more load balance testing before going live with online mode. As of this moment, there are multiple services that have problem even functioning properly.