With your attitude maybe you should get a job with Southern? Your defeatist outlook will fit in.
It might take "massive decisions" but progression often does. And it would appear many countries around the world have taken these massive decisions and made up-grades along the way. Besides, a lot...
Then why design a rail system which is so prone to the slightest issue? I'm sorry but there's no excuse, they've had 180 years to get this right after all.
Was all this chaos in Brighton really caused by an incident in Newhaven? And if it was it doesn't explain the total ineptitude of the staff with dealing with the queuing and trains leaving half empty.