I think it's harder to prove the "brokenness" of a game as opposed to the oven mentioned in the example above: a game is not a self-standing product, i.e. its operation depends on many other components that comprise each PC, as opposed to an oven, whose operation depends solely on the supply of power.
So for me the game works just as it's been designed to work: smooth single player and temperamental multilayer as it it is p2p. I am not denying others' problems with the game but pointing out that it's hard to prove unequivocally that the game is "broken."
Aside from that, they declared that they are working on the patch which is supposed to improve performance and network stability so let's hope this works.
I must say the pvp is brilliant and highly addictive, alas, the infrastructure supporting it is far from ideal.