Success and happiness in life depends on continuous improvement and progress. Once you achieve something in life, you will realize you are about you face bigger challenges that come as part of that achievement. And it is supposed to be that way.
It is like you take great efforts to climb up a steep mountain and you reach the peak one day. You stand on the top of the mountain peak and look around to realize that you would see bigger mountains around and there are more people climbing those mountains and achieving greater heights than you did.
Point here is to acknowledge that our accomplishments and greatness will always subjective compared to where others are and what others are doing. But for sure it can be objective for us to pursue it and it is worth it when we compare with our previous version. We may never be the greatest but we can sure be the the greatest version of yourself. And sometimes that greater version of yourself could be enough to make you the greatest in a given area.
*Do read the Disclaimer