Until the pain of not acting becomes greater than the pain of acting then you will not take action. Sometimes for things to change people have to hit rock bottom. They must not accept the current situation because it is too painful not to change. Eventually a shift has to happen where the pain of staying where you are at is greater than the pain of change.
When you accept the pain of change you still experience pain but there is also more pleasure, growth and happiness. Your comfort zone expands and what once was painful is now tolerable. What once was tolerable is now nothing.