Can't Join Portal Servers!

I have bought this game just to play Portal, and I can't even play it properly. If I find a server I like, I click on it and it kicks me back to the game's main page.

It is incredibly frustrating. Not to mention, the server brower in Portal is very unintutive. I press on a server to see what the experience is, I can't join it I have to press back. When I press back, the server disappears!

Also, changing loadouts is incredibly frustrating and too complicated. I spent half my time in Portal trying to figure out how to join a server and the other half in the weapon customization menu in the one server that I managed to get into ( after clicking on default BF3 Conquest). Make the server Brower and weapon customization screen like BF4 please.