I have exactly the same issue you are having. Exactly that, game menu is there, and it hangs after 5 to 10 seconds.
If I am reaaaaally fast and lucky I can join a game, once I'm in a game all is fine. But sometimes it takes me hours and hours before I get in. Not what I expected to purchase!
Noteworthy is that I have exactly the same specs you have.... same processor, memory, graphics card. DirectX 11.
Did you ever get this resolved?
Why isn't anyone from Activision providing answers to support queries? I still have a few days to return the game, which I'll do if this can't get fixed.