If you don't want to experience these problems on a new MMO launch, don't buy it until a month or two after launch. If you absolutely have to take part in launch, expect to take part in the birth pangs as well.

I know it sucks donkey balls, but it is what it is and after having taken part in several MMO launches, I've learned to expect it. If I survived the launch of WAR Europe, I can survive anything (Game wasn't up until around a week after official launch date.).