The hard thing about hitting your goals
Hitting a goal can be marvelous. It's often coupled with a sense of euphoria and delight. I know I revel in it.
But, just a little while after, something shifts and it gets kind of uncomfortable. At the time, it feels so wrong, after all, you're mostly euphoric.
And it all comes down to this:
When you set a goal, you imagine a perfect version of yourself achieving it... Yet the person who achieves it -- you -- is all too human (and, indeed, flawed).
It's not a problem with you or your goal -- its a problem with your imagination.