That's why I said temporarily. There's really no point getting frustrated over it, really it should've been expected that there would be server issues this soon after launch.
Comparing it to buying a car is just stupid, the servers are getting stressed because of the sheer volume of people trying to play simultaneously. You buy a car, you get your keys and you drive. That's it, you don't have to cram thousands of people into the car. In this case you bought the game, you got your game key but there is a third "hurdle" you have to rely on servers that ARE trying to handle thousands of people, if not close to a million. Completely different.