It's fair enough that people are frustrated, but really, as several others have stated, this whole problem is simply because there is just too many people trying to access the server at once. A server cannot handle more than a certain amount of connections at any one time (this is why websites crash due to excessive traffic) - think of it like a highway, it's built to handle a certain amount of traffic but if everyone tries using that route at the same time (such as rush hour), it becomes congested and no one goes anywhere. SE (perhaps naively) thought that not everyone would try to do the main scenario at the same time and probably thought it wouldn't be an issue. Unfortunately this was not the case. And angrily attacking SE is not going to magically get you past this roadblock, it may only just get you banned.

The best fix for this? Hold off on the storyline and go do something else instead - unlock RDM and SAM, do hunts in ARR and HW areas, take a swim in Costa del Sol (this is particularly relaxing I found). If everyone put the brakes on trying to beat each other to 70 and the final battle of the storyline/SB 'endgame' then this would not happen.

Give it a week, things would gradually sort themselves out as the congestion thins out and the rush finishes.