Why do perfectionists often feel restless, even when they achieve their goals?

What is the point of living life if all we do is suffer through conditions, losses, addictions and tragedies that aren't fixable? The Void sounds 10x better than all of that misery.
Why might someone with quiet BPD feel compelled to forgive or forget after experiencing rage?
How do successful people cope with multiple rejections from opportunities they thought they had in the bag?